56837731979 has 4 divisors (see below), whose sum is σ = 64957407984. Its totient is φ = 48718055976.

The previous prime is 56837731967. The next prime is 56837731981. The reversal of 56837731979 is 97913773865.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97913773865 = 5 ⋅19582754773.

It is a cyclic number.

It is not a de Polignac number, because 56837731979 - 2¹⁶ = 56837666443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56837731079) 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, 4059837992 + ... + 4059838005.

It is an arithmetic number, because the mean of its divisors is an integer number (16239351996).

Almost surely, 2^56837731979 is an apocalyptic number.

56837731979 is a deficient number, since it is larger than the sum of its proper divisors (8119676005).

56837731979 is an equidigital number, since it uses as much as digits as its factorization.

56837731979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8119676004.

The product of its digits is 60011280, while the sum is 65.

The spelling of 56837731979 in words is "fifty-six billion, eight hundred thirty-seven million, seven hundred thirty-one thousand, nine hundred seventy-nine".