80578518 has 16 divisors (see below), whose sum is σ = 161300160. Its totient is φ = 26835656.

The previous prime is 80578513. The next prime is 80578529. The reversal of 80578518 is 81587508.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 80578518.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80578513) 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, 2221 + ... + 12887.

It is an arithmetic number, because the mean of its divisors is an integer number (10081260).

Almost surely, 2^80578518 is an apocalyptic number.

80578518 is an abundant number, since it is smaller than the sum of its proper divisors (80721642).

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

80578518 is a wasteful number, since it uses less digits than its factorization.

80578518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11931.

The product of its (nonzero) digits is 89600, while the sum is 42.

The square root of 80578518 is about 8976.5537930767. The cubic root of 80578518 is about 431.9230937342.

The spelling of 80578518 in words is "eighty million, five hundred seventy-eight thousand, five hundred eighteen".