56691819659 has 2 divisors, whose sum is σ = 56691819660. Its totient is φ = 56691819658.

The previous prime is 56691819631. The next prime is 56691819683. The reversal of 56691819659 is 95691819665.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56691819659 - 2⁸ = 56691819403 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56691819595 and 56691819604.

It is not a weakly prime, because it can be changed into another prime (56691819689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28345909829 + 28345909830.

It is an arithmetic number, because the mean of its divisors is an integer number (28345909830).

Almost surely, 2^56691819659 is an apocalyptic number.

56691819659 is a deficient number, since it is larger than the sum of its proper divisors (1).

56691819659 is an equidigital number, since it uses as much as digits as its factorization.

56691819659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31492800, while the sum is 65.

The spelling of 56691819659 in words is "fifty-six billion, six hundred ninety-one million, eight hundred nineteen thousand, six hundred fifty-nine".