56251662818 has 8 divisors (see below), whose sum is σ = 90868070748. Its totient is φ = 25962305904.

The previous prime is 56251662799. The next prime is 56251662829. The reversal of 56251662818 is 81826615265.

It can be written as a sum of positive squares in 2 ways, for example, as 54380840809 + 1870822009 = 233197^2 + 43253^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×56251662818² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1081762721 + ... + 1081762772.

Almost surely, 2^56251662818 is an apocalyptic number.

56251662818 is a deficient number, since it is larger than the sum of its proper divisors (34616407930).

56251662818 is a wasteful number, since it uses less digits than its factorization.

56251662818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2163525508.

The product of its digits is 1382400, while the sum is 50.

The spelling of 56251662818 in words is "fifty-six billion, two hundred fifty-one million, six hundred sixty-two thousand, eight hundred eighteen".