56897321565 has 32 divisors (see below), whose sum is σ = 104379770880. Its totient is φ = 25925465664.

The previous prime is 56897321543. The next prime is 56897321581. The reversal of 56897321565 is 56512379865.

It is not a de Polignac number, because 56897321565 - 2⁸ = 56897321309 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 850305 + ... + 914774.

It is an arithmetic number, because the mean of its divisors is an integer number (3261867840).

Almost surely, 2^56897321565 is an apocalyptic number.

It is an amenable number.

56897321565 is a deficient number, since it is larger than the sum of its proper divisors (47482449315).

56897321565 is a wasteful number, since it uses less digits than its factorization.

56897321565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1765401.

The product of its digits is 13608000, while the sum is 57.

The spelling of 56897321565 in words is "fifty-six billion, eight hundred ninety-seven million, three hundred twenty-one thousand, five hundred sixty-five".