816133854 has 32 divisors (see below), whose sum is σ = 1659087360. Its totient is φ = 267603392.

The previous prime is 816133837. The next prime is 816133867. The reversal of 816133854 is 458331618.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115594 + ... + 122450.

It is an arithmetic number, because the mean of its divisors is an integer number (51846480).

Almost surely, 2^816133854 is an apocalyptic number.

816133854 is an abundant number, since it is smaller than the sum of its proper divisors (842953506).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

816133854 is a wasteful number, since it uses less digits than its factorization.

816133854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7184.

The product of its digits is 69120, while the sum is 39.

The square root of 816133854 is about 28568.0565317279. The cubic root of 816133854 is about 934.5168384567.

The spelling of 816133854 in words is "eight hundred sixteen million, one hundred thirty-three thousand, eight hundred fifty-four".