55787665836 has 24 divisors (see below), whose sum is σ = 148767109120. Its totient is φ = 15939333072.

The previous prime is 55787665823. The next prime is 55787665853. The reversal of 55787665836 is 63856678755.

It is a super-2 number, since 2×55787665836² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 332069356 + ... + 332069523.

Almost surely, 2^55787665836 is an apocalyptic number.

It is an amenable number.

55787665836 is an abundant number, since it is smaller than the sum of its proper divisors (92979443284).

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

55787665836 is a wasteful number, since it uses less digits than its factorization.

55787665836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664138893 (or 664138891 counting only the distinct ones).

The product of its digits is 254016000, while the sum is 66.

The spelling of 55787665836 in words is "fifty-five billion, seven hundred eighty-seven million, six hundred sixty-five thousand, eight hundred thirty-six".