80818506 has 16 divisors (see below), whose sum is σ = 179596800. Its totient is φ = 26939484.

The previous prime is 80818499. The next prime is 80818523. The reversal of 80818506 is 60581808.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 748266 + ... + 748373.

It is an arithmetic number, because the mean of its divisors is an integer number (11224800).

Almost surely, 2^80818506 is an apocalyptic number.

80818506 is an abundant number, since it is smaller than the sum of its proper divisors (98778294).

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

80818506 is a wasteful number, since it uses less digits than its factorization.

80818506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1496650 (or 1496644 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 36.

The square root of 80818506 is about 8989.9113455028. The cubic root of 80818506 is about 432.3514693729.

The spelling of 80818506 in words is "eighty million, eight hundred eighteen thousand, five hundred six".