56631677457 has 16 divisors (see below), whose sum is σ = 79506904320. Its totient is φ = 35756643600.

The previous prime is 56631677423. The next prime is 56631677491. The reversal of 56631677457 is 75477613665.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (56631677423) and next prime (56631677491).

It is not a de Polignac number, because 56631677457 - 2²⁰ = 56630628881 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a junction number, because it is equal to n+sod(n) for n = 56631677397 and 56631677406.

It is not an unprimeable number, because it can be changed into a prime (56631677407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44782 + ... + 339512.

It is an arithmetic number, because the mean of its divisors is an integer number (4969181520).

Almost surely, 2^56631677457 is an apocalyptic number.

56631677457 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

It is an amenable number.

56631677457 is a deficient number, since it is larger than the sum of its proper divisors (22875226863).

56631677457 is a wasteful number, since it uses less digits than its factorization.

56631677457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298124.

The product of its digits is 22226400, while the sum is 57.

The spelling of 56631677457 in words is "fifty-six billion, six hundred thirty-one million, six hundred seventy-seven thousand, four hundred fifty-seven".