53355020544 has 576 divisors, whose sum is σ = 191723929600. Its totient is φ = 14296891392.

The previous prime is 53355020513. The next prime is 53355020549. The reversal of 53355020544 is 44502055335.

53355020544 is a `hidden beast` number, since 5 + 33 + 550 + 20 + 54 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 53355020499 and 53355020508.

It is not an unprimeable number, because it can be changed into a prime (53355020549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 116750364 + ... + 116750820.

Almost surely, 2^53355020544 is an apocalyptic number.

53355020544 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53355020544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95861964800).

53355020544 is an abundant number, since it is smaller than the sum of its proper divisors (138368909056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

53355020544 is a wasteful number, since it uses less digits than its factorization.

53355020544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635 (or 615 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 36.

Adding to 53355020544 its reverse (44502055335), we get a palindrome (97857075879).

The spelling of 53355020544 in words is "fifty-three billion, three hundred fifty-five million, twenty thousand, five hundred forty-four".