80818818 has 16 divisors (see below), whose sum is σ = 170145120. Its totient is φ = 25521696.

The previous prime is 80818783. The next prime is 80818873. The reversal of 80818818 is 81881808.

It is a self number, because there is not a number n which added to its sum of digits gives 80818818.

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, 354355 + ... + 354582.

It is an arithmetic number, because the mean of its divisors is an integer number (10634070).

Almost surely, 2^80818818 is an apocalyptic number.

80818818 is an abundant number, since it is smaller than the sum of its proper divisors (89326302).

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

80818818 is a wasteful number, since it uses less digits than its factorization.

80818818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708961.

The product of its (nonzero) digits is 32768, while the sum is 42.

The square root of 80818818 is about 8989.9286982712. The cubic root of 80818818 is about 432.3520257368.

The spelling of 80818818 in words is "eighty million, eight hundred eighteen thousand, eight hundred eighteen".