79307458640640 has 3456 divisors, whose sum is σ = 333242980761600. Its totient is φ = 17253838356480.

The previous prime is 79307458640629. The next prime is 79307458640647. The reversal of 79307458640640 is 4604685470397.

It is a happy number.

79307458640640 is a `hidden beast` number, since 7 + 9 + 3 + 0 + 7 + 4 + 586 + 4 + 0 + 6 + 40 = 666.

It is not an unprimeable number, because it can be changed into a prime (79307458640647) by changing a digit.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 443058428071 + ... + 443058428249.

It is an arithmetic number, because the mean of its divisors is an integer number (96424473600).

Almost surely, 2^{79307458640640} 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 79307458640640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166621490380800).

79307458640640 is an abundant number, since it is smaller than the sum of its proper divisors (253935522120960).

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

79307458640640 is a wasteful number, since it uses less digits than its factorization.

79307458640640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463 (or 446 counting only the distinct ones).

The product of its (nonzero) digits is 121927680, while the sum is 63.

The spelling of 79307458640640 in words is "seventy-nine trillion, three hundred seven billion, four hundred fifty-eight million, six hundred forty thousand, six hundred forty".