53345512840 has 16 divisors (see below), whose sum is σ = 120027403980. Its totient is φ = 21338205120.

The previous prime is 53345512837. The next prime is 53345512841. The reversal of 53345512840 is 4821554335.

It can be written as a sum of positive squares in 2 ways, for example, as 48700545124 + 4644967716 = 220682^2 + 68154^2 .

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 1333637821 = 53345512840 / (5 + 3 + 3 + 4 + 5 + 5 + 1 + 2 + 8 + 4 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 53345512793 and 53345512802.

It is not an unprimeable number, because it can be changed into a prime (53345512841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 666818871 + ... + 666818950.

Almost surely, 2^53345512840 is an apocalyptic number.

It is an amenable number.

53345512840 is an abundant number, since it is smaller than the sum of its proper divisors (66681891140).

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

53345512840 is a wasteful number, since it uses less digits than its factorization.

53345512840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333637832 (or 1333637828 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 40.

The spelling of 53345512840 in words is "fifty-three billion, three hundred forty-five million, five hundred twelve thousand, eight hundred forty".