56780899939 has 2 divisors, whose sum is σ = 56780899940. Its totient is φ = 56780899938.

The previous prime is 56780899913. The next prime is 56780899957. The reversal of 56780899939 is 93999808765.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56780899939 - 2⁵ = 56780899907 is a prime.

It is not a weakly prime, because it can be changed into another prime (56780819939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28390449969 + 28390449970.

It is an arithmetic number, because the mean of its divisors is an integer number (28390449970).

Almost surely, 2^56780899939 is an apocalyptic number.

56780899939 is a deficient number, since it is larger than the sum of its proper divisors (1).

56780899939 is an equidigital number, since it uses as much as digits as its factorization.

56780899939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 264539520, while the sum is 73.

The spelling of 56780899939 in words is "fifty-six billion, seven hundred eighty million, eight hundred ninety-nine thousand, nine hundred thirty-nine".