55157569128 has 48 divisors (see below), whose sum is σ = 149689425600. Its totient is φ = 18348398880.

The previous prime is 55157569111. The next prime is 55157569133. The reversal of 55157569128 is 82196575155.

55157569128 is a `hidden beast` number, since 5 + 5 + 1 + 57 + 569 + 1 + 28 = 666.

It is a super-2 number, since 2×55157569128² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 744768 + ... + 815471.

It is an arithmetic number, because the mean of its divisors is an integer number (3118529700).

Almost surely, 2^55157569128 is an apocalyptic number.

It is an amenable number.

55157569128 is an abundant number, since it is smaller than the sum of its proper divisors (94531856472).

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

55157569128 is a wasteful number, since it uses less digits than its factorization.

55157569128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1560742 (or 1560735 counting only the distinct ones).

The product of its digits is 3780000, while the sum is 54.

The spelling of 55157569128 in words is "fifty-five billion, one hundred fifty-seven million, five hundred sixty-nine thousand, one hundred twenty-eight".