78913518 has 16 divisors (see below), whose sum is σ = 160050816. Its totient is φ = 25933880.

The previous prime is 78913501. The next prime is 78913543. The reversal of 78913518 is 81531987.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 78913518.

It is a congruent number.

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, 92196 + ... + 93047.

It is an arithmetic number, because the mean of its divisors is an integer number (10003176).

Almost surely, 2^78913518 is an apocalyptic number.

78913518 is an abundant number, since it is smaller than the sum of its proper divisors (81137298).

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

78913518 is a wasteful number, since it uses less digits than its factorization.

78913518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185319.

The product of its digits is 60480, while the sum is 42.

The square root of 78913518 is about 8883.3280925563. The cubic root of 78913518 is about 428.9274114990.

The spelling of 78913518 in words is "seventy-eight million, nine hundred thirteen thousand, five hundred eighteen".