79193894418 has 12 divisors (see below), whose sum is σ = 171586771278. Its totient is φ = 26397964800.

The previous prime is 79193894413. The next prime is 79193894431. The reversal of 79193894418 is 81449839197.

It can be written as a sum of positive squares in only one way, i.e., 48001742649 + 31192151769 = 219093^2 + 176613^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (79193894413) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2199830383 + ... + 2199830418.

Almost surely, 2^79193894418 is an apocalyptic number.

79193894418 is an abundant number, since it is smaller than the sum of its proper divisors (92392876860).

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

79193894418 is a wasteful number, since it uses less digits than its factorization.

79193894418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4399660809 (or 4399660806 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 63.

The spelling of 79193894418 in words is "seventy-nine billion, one hundred ninety-three million, eight hundred ninety-four thousand, four hundred eighteen".