80994815 has 32 divisors (see below), whose sum is σ = 112492800. Its totient is φ = 55365120.

The previous prime is 80994773. The next prime is 80994839. The reversal of 80994815 is 51849908.

It is not a de Polignac number, because 80994815 - 2⁶ = 80994751 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 186839 + ... + 187271.

It is an arithmetic number, because the mean of its divisors is an integer number (3515400).

Almost surely, 2^80994815 is an apocalyptic number.

80994815 is a deficient number, since it is larger than the sum of its proper divisors (31497985).

80994815 is a wasteful number, since it uses less digits than its factorization.

80994815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647.

The product of its (nonzero) digits is 103680, while the sum is 44.

The square root of 80994815 is about 8999.7119398345. The cubic root of 80994815 is about 432.6656387174.

The spelling of 80994815 in words is "eighty million, nine hundred ninety-four thousand, eight hundred fifteen".