56251561810 has 16 divisors (see below), whose sum is σ = 104519031552. Its totient is φ = 21774798000.

The previous prime is 56251561763. The next prime is 56251561837. The reversal of 56251561810 is 1816515265.

It is a super-2 number, since 2×56251561810² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90728016 + ... + 90728635.

It is an arithmetic number, because the mean of its divisors is an integer number (6532439472).

Almost surely, 2^56251561810 is an apocalyptic number.

56251561810 is a deficient number, since it is larger than the sum of its proper divisors (48267469742).

56251561810 is a wasteful number, since it uses less digits than its factorization.

56251561810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181456689.

The product of its (nonzero) digits is 72000, while the sum is 40.

The spelling of 56251561810 in words is "fifty-six billion, two hundred fifty-one million, five hundred sixty-one thousand, eight hundred ten".