56972793081 has 4 divisors (see below), whose sum is σ = 75963724112. Its totient is φ = 37981862052.

The previous prime is 56972793061. The next prime is 56972793113. The reversal of 56972793081 is 18039727965.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 56972793081 - 2⁵ = 56972793049 is a prime.

It is a super-2 number, since 2×56972793081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56972793061) 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, 9495465511 + ... + 9495465516.

It is an arithmetic number, because the mean of its divisors is an integer number (18990931028).

Almost surely, 2^56972793081 is an apocalyptic number.

It is an amenable number.

56972793081 is a deficient number, since it is larger than the sum of its proper divisors (18990931031).

56972793081 is a wasteful number, since it uses less digits than its factorization.

56972793081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18990931030.

The product of its (nonzero) digits is 5715360, while the sum is 57.

The spelling of 56972793081 in words is "fifty-six billion, nine hundred seventy-two million, seven hundred ninety-three thousand, eighty-one".