56891905885 has 16 divisors (see below), whose sum is σ = 68952249216. Its totient is φ = 45059426368.

The previous prime is 56891905843. The next prime is 56891905907. The reversal of 56891905885 is 58850919865.

It is a cyclic number.

It is not a de Polignac number, because 56891905885 - 2¹³ = 56891897693 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 826659 + ... + 892831.

It is an arithmetic number, because the mean of its divisors is an integer number (4309515576).

Almost surely, 2^56891905885 is an apocalyptic number.

It is an amenable number.

56891905885 is a deficient number, since it is larger than the sum of its proper divisors (12060343331).

56891905885 is a wasteful number, since it uses less digits than its factorization.

56891905885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67892.

The product of its (nonzero) digits is 31104000, while the sum is 64.

The spelling of 56891905885 in words is "fifty-six billion, eight hundred ninety-one million, nine hundred five thousand, eight hundred eighty-five".