855157964944 has 20 divisors (see below), whose sum is σ = 1673273199420. Its totient is φ = 423345526400.

The previous prime is 855157964911. The next prime is 855157964957. The reversal of 855157964944 is 449469751558.

It can be written as a sum of positive squares in 2 ways, for example, as 412533874944 + 442624090000 = 642288^2 + 665300^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 855157964944.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 264589339 + ... + 264592570.

It is an arithmetic number, because the mean of its divisors is an integer number (83663659971).

Almost surely, 2^855157964944 is an apocalyptic number.

It is an amenable number.

855157964944 is a deficient number, since it is larger than the sum of its proper divisors (818115234476).

855157964944 is a wasteful number, since it uses less digits than its factorization.

855157964944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529182018 (or 529182012 counting only the distinct ones).

The product of its digits is 217728000, while the sum is 67.

The spelling of 855157964944 in words is "eight hundred fifty-five billion, one hundred fifty-seven million, nine hundred sixty-four thousand, nine hundred forty-four".