79091787400 has 24 divisors (see below), whose sum is σ = 183888406170. Its totient is φ = 31636714880.

The previous prime is 79091787367. The next prime is 79091787403. The reversal of 79091787400 is 478719097.

It can be written as a sum of positive squares in 3 ways, for example, as 41479839556 + 37611947844 = 203666^2 + 193938^2 .

It is not an unprimeable number, because it can be changed into a prime (79091787403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 197729269 + ... + 197729668.

Almost surely, 2^79091787400 is an apocalyptic number.

It is an amenable number.

79091787400 is an abundant number, since it is smaller than the sum of its proper divisors (104796618770).

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

79091787400 is a wasteful number, since it uses less digits than its factorization.

79091787400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395458953 (or 395458944 counting only the distinct ones).

The product of its (nonzero) digits is 889056, while the sum is 52.

The spelling of 79091787400 in words is "seventy-nine billion, ninety-one million, seven hundred eighty-seven thousand, four hundred".