80815964 has 12 divisors (see below), whose sum is σ = 143365824. Its totient is φ = 39854304.

The previous prime is 80815921. The next prime is 80815981. The reversal of 80815964 is 46951808.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138092 + ... + 138675.

It is an arithmetic number, because the mean of its divisors is an integer number (11947152).

Almost surely, 2^80815964 is an apocalyptic number.

It is an amenable number.

80815964 is a deficient number, since it is larger than the sum of its proper divisors (62549860).

80815964 is a wasteful number, since it uses less digits than its factorization.

80815964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276844 (or 276842 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 80815964 is about 8989.7699636865. The cubic root of 80815964 is about 432.3469363808.

The spelling of 80815964 in words is "eighty million, eight hundred fifteen thousand, nine hundred sixty-four".