79040636400 has 960 divisors, whose sum is σ = 306322394112. Its totient is φ = 17346560000.

The previous prime is 79040636387. The next prime is 79040636401. The reversal of 79040636400 is 463604097.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79040636401) 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 191 ways as a sum of consecutive naturals, for example, 1113248365 + ... + 1113248435.

Almost surely, 2^79040636400 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79040636400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153161197056).

79040636400 is an abundant number, since it is smaller than the sum of its proper divisors (227281757712).

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

79040636400 is a wasteful number, since it uses less digits than its factorization.

79040636400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183 (or 150 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 39.

The spelling of 79040636400 in words is "seventy-nine billion, forty million, six hundred thirty-six thousand, four hundred".