71812164 has 24 divisors (see below), whose sum is σ = 174847680. Its totient is φ = 22896544.

The previous prime is 71812163. The next prime is 71812177. The reversal of 71812164 is 46121817.

It is not an unprimeable number, because it can be changed into a prime (71812163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129819 + ... + 130370.

It is an arithmetic number, because the mean of its divisors is an integer number (7285320).

Almost surely, 2^71812164 is an apocalyptic number.

It is an amenable number.

71812164 is an abundant number, since it is smaller than the sum of its proper divisors (103035516).

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

71812164 is a wasteful number, since it uses less digits than its factorization.

71812164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260219 (or 260217 counting only the distinct ones).

The product of its digits is 2688, while the sum is 30.

The square root of 71812164 is about 8474.2058034957. The cubic root of 71812164 is about 415.6546767511.

The spelling of 71812164 in words is "seventy-one million, eight hundred twelve thousand, one hundred sixty-four".