80817812 has 24 divisors (see below), whose sum is σ = 146901216. Its totient is φ = 38874528.

The previous prime is 80817761. The next prime is 80817829. The reversal of 80817812 is 21871808.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 8018 + ... + 15030.

It is an arithmetic number, because the mean of its divisors is an integer number (6120884).

Almost surely, 2^80817812 is an apocalyptic number.

It is an amenable number.

80817812 is a deficient number, since it is larger than the sum of its proper divisors (66083404).

80817812 is a wasteful number, since it uses less digits than its factorization.

80817812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7127 (or 7125 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 35.

The square root of 80817812 is about 8989.8727465966. The cubic root of 80817812 is about 432.3502318149.

The spelling of 80817812 in words is "eighty million, eight hundred seventeen thousand, eight hundred twelve".