818165868 has 48 divisors (see below), whose sum is σ = 2176846560. Its totient is φ = 236934144.

The previous prime is 818165837. The next prime is 818165869. The reversal of 818165868 is 868561818.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 818165868.

It is not an unprimeable number, because it can be changed into a prime (818165869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151603 + ... + 156906.

It is an arithmetic number, because the mean of its divisors is an integer number (45350970).

Almost surely, 2^818165868 is an apocalyptic number.

It is an amenable number.

818165868 is an abundant number, since it is smaller than the sum of its proper divisors (1358680692).

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

818165868 is a wasteful number, since it uses less digits than its factorization.

818165868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308546 (or 308544 counting only the distinct ones).

The product of its digits is 737280, while the sum is 51.

The square root of 818165868 is about 28603.5988644786. The cubic root of 818165868 is about 935.2917838328.

The spelling of 818165868 in words is "eight hundred eighteen million, one hundred sixty-five thousand, eight hundred sixty-eight".