56994308721 has 80 divisors (see below), whose sum is σ = 103481445760. Its totient is φ = 30535418880.

The previous prime is 56994308719. The next prime is 56994308809. The reversal of 56994308721 is 12780349965.

56994308721 is a `hidden beast` number, since 56 + 99 + 430 + 8 + 72 + 1 = 666.

It is not a de Polignac number, because 56994308721 - 2¹ = 56994308719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56994308621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1017711 + ... + 1072251.

It is an arithmetic number, because the mean of its divisors is an integer number (1293518072).

It is a 1-persistent number, because it is pandigital, but 2⋅56994308721 = 113988617442 is not.

Almost surely, 2^56994308721 is an apocalyptic number.

It is an amenable number.

56994308721 is a deficient number, since it is larger than the sum of its proper divisors (46487137039).

56994308721 is a wasteful number, since it uses less digits than its factorization.

56994308721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54676 (or 54667 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The spelling of 56994308721 in words is "fifty-six billion, nine hundred ninety-four million, three hundred eight thousand, seven hundred twenty-one".