816115923 has 72 divisors (see below), whose sum is σ = 1515410208. Its totient is φ = 419747328.

The previous prime is 816115921. The next prime is 816115931. The reversal of 816115923 is 329511618.

816115923 is a `hidden beast` number, since 8 + 1 + 61 + 1 + 592 + 3 = 666.

It is not a de Polignac number, because 816115923 - 2¹ = 816115921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (816115921) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 170065 + ... + 174797.

It is an arithmetic number, because the mean of its divisors is an integer number (21047364).

Almost surely, 2^816115923 is an apocalyptic number.

816115923 is a deficient number, since it is larger than the sum of its proper divisors (699294285).

816115923 is a wasteful number, since it uses less digits than its factorization.

816115923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4793 (or 4783 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 816115923 is about 28567.7427004655. The cubic root of 816115923 is about 934.5099944224.

The spelling of 816115923 in words is "eight hundred sixteen million, one hundred fifteen thousand, nine hundred twenty-three".