80817864 has 32 divisors (see below), whose sum is σ = 213930720. Its totient is φ = 25354496.

The previous prime is 80817859. The next prime is 80817889. The reversal of 80817864 is 46871808.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98634 + ... + 99449.

It is an arithmetic number, because the mean of its divisors is an integer number (6685335).

Almost surely, 2^80817864 is an apocalyptic number.

It is an amenable number.

80817864 is an abundant number, since it is smaller than the sum of its proper divisors (133112856).

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

80817864 is a wasteful number, since it uses less digits than its factorization.

80817864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198109 (or 198105 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 42.

The square root of 80817864 is about 8989.8756387394. The cubic root of 80817864 is about 432.3503245428.

The spelling of 80817864 in words is "eighty million, eight hundred seventeen thousand, eight hundred sixty-four".