56171857856 has 14 divisors (see below), whose sum is σ = 111466030560. Its totient is φ = 28085928896.

The previous prime is 56171857823. The next prime is 56171857867. The reversal of 56171857856 is 65875817165.

It is a super-2 number, since 2×56171857856² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 56171857795 and 56171857804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 438842576 + ... + 438842703.

Almost surely, 2^56171857856 is an apocalyptic number.

It is an amenable number.

56171857856 is a deficient number, since it is larger than the sum of its proper divisors (55294172704).

56171857856 is an equidigital number, since it uses as much as digits as its factorization.

56171857856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 877685291 (or 877685281 counting only the distinct ones).

The product of its digits is 14112000, while the sum is 59.

The spelling of 56171857856 in words is "fifty-six billion, one hundred seventy-one million, eight hundred fifty-seven thousand, eight hundred fifty-six".