56840074721 has 4 divisors (see below), whose sum is σ = 56888949552. Its totient is φ = 56791199892.

The previous prime is 56840074679. The next prime is 56840074747. The reversal of 56840074721 is 12747004865.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56840074721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56840074751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24435671 + ... + 24437996.

It is an arithmetic number, because the mean of its divisors is an integer number (14222237388).

Almost surely, 2^56840074721 is an apocalyptic number.

It is an amenable number.

56840074721 is a deficient number, since it is larger than the sum of its proper divisors (48874831).

56840074721 is a wasteful number, since it uses less digits than its factorization.

56840074721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48874830.

The product of its (nonzero) digits is 376320, while the sum is 44.

The spelling of 56840074721 in words is "fifty-six billion, eight hundred forty million, seventy-four thousand, seven hundred twenty-one".