56005555988 has 6 divisors (see below), whose sum is σ = 98009722986. Its totient is φ = 28002777992.

The previous prime is 56005555987. The next prime is 56005555999. The reversal of 56005555988 is 88955550065.

It can be written as a sum of positive squares in only one way, i.e., 40653850384 + 15351705604 = 201628^2 + 123902^2 .

It is a super-2 number, since 2×56005555988² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56005555987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7000694495 + ... + 7000694502.

It is an arithmetic number, because the mean of its divisors is an integer number (16334953831).

Almost surely, 2^56005555988 is an apocalyptic number.

It is an amenable number.

56005555988 is a deficient number, since it is larger than the sum of its proper divisors (42004166998).

56005555988 is a wasteful number, since it uses less digits than its factorization.

56005555988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14001389001 (or 14001388999 counting only the distinct ones).

The product of its (nonzero) digits is 10800000, while the sum is 56.

The spelling of 56005555988 in words is "fifty-six billion, five million, five hundred fifty-five thousand, nine hundred eighty-eight".