56805399951 has 16 divisors (see below), whose sum is σ = 77097121920. Its totient is φ = 37193186720.

The previous prime is 56805399941. The next prime is 56805399953. The reversal of 56805399951 is 15999350865.

It is a cyclic number.

It is not a de Polignac number, because 56805399951 - 2¹⁵ = 56805367183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56805399953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36556 + ... + 339038.

It is an arithmetic number, because the mean of its divisors is an integer number (4818570120).

Almost surely, 2^56805399951 is an apocalyptic number.

56805399951 is a deficient number, since it is larger than the sum of its proper divisors (20291721969).

56805399951 is a wasteful number, since it uses less digits than its factorization.

56805399951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303606.

The product of its (nonzero) digits is 13122000, while the sum is 60.

The spelling of 56805399951 in words is "fifty-six billion, eight hundred five million, three hundred ninety-nine thousand, nine hundred fifty-one".