56553966920 has 64 divisors (see below), whose sum is σ = 140162106240. Its totient is φ = 20365401600.

The previous prime is 56553966913. The next prime is 56553966947. The reversal of 56553966920 is 2966935565.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 578621 + ... + 669260.

It is an arithmetic number, because the mean of its divisors is an integer number (2190032910).

Almost surely, 2^56553966920 is an apocalyptic number.

It is an amenable number.

56553966920 is an abundant number, since it is smaller than the sum of its proper divisors (83608139320).

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

56553966920 is a wasteful number, since it uses less digits than its factorization.

56553966920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248006 (or 1248002 counting only the distinct ones).

The product of its (nonzero) digits is 13122000, while the sum is 56.

The spelling of 56553966920 in words is "fifty-six billion, five hundred fifty-three million, nine hundred sixty-six thousand, nine hundred twenty".