56715872261 has 8 divisors (see below), whose sum is σ = 57517472064. Its totient is φ = 55914939360.

The previous prime is 56715872249. The next prime is 56715872273. The reversal of 56715872261 is 16227851765.

It is an interprime number because it is at equal distance from previous prime (56715872249) and next prime (56715872273).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56715872261 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 (56715872221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5816 + ... + 336846.

It is an arithmetic number, because the mean of its divisors is an integer number (7189684008).

Almost surely, 2^56715872261 is an apocalyptic number.

It is an amenable number.

56715872261 is a deficient number, since it is larger than the sum of its proper divisors (801599803).

56715872261 is a wasteful number, since it uses less digits than its factorization.

56715872261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333451.

The product of its digits is 1411200, while the sum is 50.

The spelling of 56715872261 in words is "fifty-six billion, seven hundred fifteen million, eight hundred seventy-two thousand, two hundred sixty-one".