56611321668 has 72 divisors (see below), whose sum is σ = 156164351616. Its totient is φ = 17148974400.

The previous prime is 56611321651. The next prime is 56611321691. The reversal of 56611321668 is 86612311665.

56611321668 is a `hidden beast` number, since 5 + 6 + 611 + 3 + 21 + 6 + 6 + 8 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1188805 + ... + 1235507.

It is an arithmetic number, because the mean of its divisors is an integer number (2168949328).

Almost surely, 2^56611321668 is an apocalyptic number.

It is an amenable number.

56611321668 is an abundant number, since it is smaller than the sum of its proper divisors (99553029948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56611321668 is a wasteful number, since it uses less digits than its factorization.

56611321668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49785 (or 49780 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The spelling of 56611321668 in words is "fifty-six billion, six hundred eleven million, three hundred twenty-one thousand, six hundred sixty-eight".