56640621001 has 16 divisors (see below), whose sum is σ = 59055933888. Its totient is φ = 54279244800.

The previous prime is 56640620989. The next prime is 56640621049. The reversal of 56640621001 is 10012604665.

It is a cyclic number.

It is not a de Polignac number, because 56640621001 - 2⁷ = 56640620873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56640621901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 940486 + ... + 998896.

It is an arithmetic number, because the mean of its divisors is an integer number (3690995868).

Almost surely, 2^56640621001 is an apocalyptic number.

It is an amenable number.

56640621001 is a deficient number, since it is larger than the sum of its proper divisors (2415312887).

56640621001 is a wasteful number, since it uses less digits than its factorization.

56640621001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58872.

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 56640621001 in words is "fifty-six billion, six hundred forty million, six hundred twenty-one thousand, one".