555121985040 has 400 divisors, whose sum is σ = 2299259052288. Its totient is φ = 121368056832.

The previous prime is 555121985027. The next prime is 555121985053. The reversal of 555121985040 is 40589121555.

555121985040 is a `hidden beast` number, since 5 + 5 + 51 + 2 + 1 + 98 + 504 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (555121985027) and next prime (555121985053).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 777234 + ... + 1309326.

Almost surely, 2^555121985040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 555121985040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1149629526144).

555121985040 is an abundant number, since it is smaller than the sum of its proper divisors (1744137067248).

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

555121985040 is a wasteful number, since it uses less digits than its factorization.

555121985040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532148 (or 532133 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 45.

The spelling of 555121985040 in words is "five hundred fifty-five billion, one hundred twenty-one million, nine hundred eighty-five thousand, forty".