56511005090 has 24 divisors (see below), whose sum is σ = 108055304532. Its totient is φ = 21274730240.

The previous prime is 56511005069. The next prime is 56511005099. The reversal of 56511005090 is 9050011565.

It can be written as a sum of positive squares in 6 ways, for example, as 25357696081 + 31153309009 = 159241^2 + 176503^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56511005099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9774101 + ... + 9779880.

Almost surely, 2^56511005090 is an apocalyptic number.

56511005090 is a deficient number, since it is larger than the sum of its proper divisors (51544299442).

56511005090 is a wasteful number, since it uses less digits than its factorization.

56511005090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19554022 (or 19554005 counting only the distinct ones).

The product of its (nonzero) digits is 6750, while the sum is 32.

The spelling of 56511005090 in words is "fifty-six billion, five hundred eleven million, five thousand, ninety".