80819664 has 40 divisors (see below), whose sum is σ = 210394272. Its totient is φ = 26732160.

The previous prime is 80819663. The next prime is 80819681. The reversal of 80819664 is 46691808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80819663) 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, 139 + ... + 12714.

Almost surely, 2^80819664 is an apocalyptic number.

It is an amenable number.

80819664 is an abundant number, since it is smaller than the sum of its proper divisors (129574608).

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

80819664 is a wasteful number, since it uses less digits than its factorization.

80819664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12995 (or 12989 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 80819664 is about 8989.9757508016. The cubic root of 80819664 is about 432.3535343316.

The spelling of 80819664 in words is "eighty million, eight hundred nineteen thousand, six hundred sixty-four".