56558633021 has 32 divisors (see below), whose sum is σ = 70367616000. Its totient is φ = 44779150080.

The previous prime is 56558633017. The next prime is 56558633063. The reversal of 56558633021 is 12033685565.

It is a cyclic number.

It is not a de Polignac number, because 56558633021 - 2² = 56558633017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56558633071) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32321 + ... + 337878.

It is an arithmetic number, because the mean of its divisors is an integer number (2198988000).

Almost surely, 2^56558633021 is an apocalyptic number.

It is an amenable number.

56558633021 is a deficient number, since it is larger than the sum of its proper divisors (13808982979).

56558633021 is a wasteful number, since it uses less digits than its factorization.

56558633021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370289.

The product of its (nonzero) digits is 648000, while the sum is 44.

The spelling of 56558633021 in words is "fifty-six billion, five hundred fifty-eight million, six hundred thirty-three thousand, twenty-one".