855707978923 has 32 divisors (see below), whose sum is σ = 1014299320320. Its totient is φ = 706336848000.

The previous prime is 855707978899. The next prime is 855707978933. The reversal of 855707978923 is 329879707558.

It is a de Polignac number, because none of the positive numbers 2^k-855707978923 is a prime.

It is a super-2 number, since 2×855707978923² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (855707978933) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 231834508 + ... + 231838198.

It is an arithmetic number, because the mean of its divisors is an integer number (31696853760).

Almost surely, 2^855707978923 is an apocalyptic number.

855707978923 is a deficient number, since it is larger than the sum of its proper divisors (158591341397).

855707978923 is a wasteful number, since it uses less digits than its factorization.

855707978923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6379.

The product of its (nonzero) digits is 266716800, while the sum is 70.

The spelling of 855707978923 in words is "eight hundred fifty-five billion, seven hundred seven million, nine hundred seventy-eight thousand, nine hundred twenty-three".