56861357647 has 4 divisors (see below), whose sum is σ = 56864046880. Its totient is φ = 56858668416.

The previous prime is 56861357629. The next prime is 56861357671. The reversal of 56861357647 is 74675316865.

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 56861357647 - 2⁷ = 56861357519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56861357591 and 56861357600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56861357617) 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, 1312647 + ... + 1355272.

It is an arithmetic number, because the mean of its divisors is an integer number (14216011720).

Almost surely, 2^56861357647 is an apocalyptic number.

56861357647 is a deficient number, since it is larger than the sum of its proper divisors (2689233).

56861357647 is a wasteful number, since it uses less digits than its factorization.

56861357647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2689232.

The product of its digits is 25401600, while the sum is 58.

The spelling of 56861357647 in words is "fifty-six billion, eight hundred sixty-one million, three hundred fifty-seven thousand, six hundred forty-seven".