56691819597 has 16 divisors (see below), whose sum is σ = 86391411840. Its totient is φ = 32393871552.

The previous prime is 56691819581. The next prime is 56691819631. The reversal of 56691819597 is 79591819665.

It is not a de Polignac number, because 56691819597 - 2⁴ = 56691819581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56691819517) 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, 572143 + ... + 663875.

It is an arithmetic number, because the mean of its divisors is an integer number (5399463240).

Almost surely, 2^56691819597 is an apocalyptic number.

It is an amenable number.

56691819597 is a deficient number, since it is larger than the sum of its proper divisors (29699592243).

56691819597 is a wasteful number, since it uses less digits than its factorization.

56691819597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121172.

The product of its digits is 36741600, while the sum is 66.

The spelling of 56691819597 in words is "fifty-six billion, six hundred ninety-one million, eight hundred nineteen thousand, five hundred ninety-seven".