56647635647 has 4 divisors (see below), whose sum is σ = 56701535496. Its totient is φ = 56593735800.

The previous prime is 56647635643. The next prime is 56647635661. The reversal of 56647635647 is 74653674665.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 56647635647 - 2² = 56647635643 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56647635643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26948348 + ... + 26950449.

It is an arithmetic number, because the mean of its divisors is an integer number (14175383874).

Almost surely, 2^56647635647 is an apocalyptic number.

56647635647 is a deficient number, since it is larger than the sum of its proper divisors (53899849).

56647635647 is a wasteful number, since it uses less digits than its factorization.

56647635647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53899848.

The product of its digits is 76204800, while the sum is 59.

The spelling of 56647635647 in words is "fifty-six billion, six hundred forty-seven million, six hundred thirty-five thousand, six hundred forty-seven".