855513097923 has 64 divisors (see below), whose sum is σ = 1273410657792. Its totient is φ = 506572308480.

The previous prime is 855513097913. The next prime is 855513097931. The reversal of 855513097923 is 329790315558.

855513097923 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 855513097923 - 2³² = 851218130627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (855513097913) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 92955640 + ... + 92964842.

It is an arithmetic number, because the mean of its divisors is an integer number (19897041528).

Almost surely, 2^855513097923 is an apocalyptic number.

855513097923 is a deficient number, since it is larger than the sum of its proper divisors (417897559869).

855513097923 is a wasteful number, since it uses less digits than its factorization.

855513097923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9684.

The product of its (nonzero) digits is 10206000, while the sum is 57.

The spelling of 855513097923 in words is "eight hundred fifty-five billion, five hundred thirteen million, ninety-seven thousand, nine hundred twenty-three".