55155987568 has 60 divisors (see below), whose sum is σ = 122570061264. Its totient is φ = 23980844800.

The previous prime is 55155987521. The next prime is 55155987577. The reversal of 55155987568 is 86578955155.

55155987568 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 574813 + ... + 663868.

Almost surely, 2^55155987568 is an apocalyptic number.

It is an amenable number.

55155987568 is an abundant number, since it is smaller than the sum of its proper divisors (67414073696).

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

55155987568 is a wasteful number, since it uses less digits than its factorization.

55155987568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1238734 (or 1238717 counting only the distinct ones).

The product of its digits is 75600000, while the sum is 64.

The spelling of 55155987568 in words is "fifty-five billion, one hundred fifty-five million, nine hundred eighty-seven thousand, five hundred sixty-eight".