56871710891 has 8 divisors (see below), whose sum is σ = 58845309600. Its totient is φ = 54898945920.

The previous prime is 56871710881. The next prime is 56871710957. The reversal of 56871710891 is 19801717865.

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-56871710891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56871710881) 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, 68030 + ... + 344051.

It is an arithmetic number, because the mean of its divisors is an integer number (7355663700).

Almost surely, 2^56871710891 is an apocalyptic number.

56871710891 is a deficient number, since it is larger than the sum of its proper divisors (1973598709).

56871710891 is a wasteful number, since it uses less digits than its factorization.

56871710891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416869.

The product of its (nonzero) digits is 846720, while the sum is 53.

The spelling of 56871710891 in words is "fifty-six billion, eight hundred seventy-one million, seven hundred ten thousand, eight hundred ninety-one".