79912752640 has 320 divisors, whose sum is σ = 227685427200. Its totient is φ = 26318831616.

The previous prime is 79912752587. The next prime is 79912752653. The reversal of 79912752640 is 4625721997.

It is a tau number, because it is divible by the number of its divisors (320).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 190722351 + ... + 190722769.

It is an arithmetic number, because the mean of its divisors is an integer number (711516960).

Almost surely, 2^79912752640 is an apocalyptic number.

79912752640 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79912752640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113842713600).

79912752640 is an abundant number, since it is smaller than the sum of its proper divisors (147772674560).

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

79912752640 is a wasteful number, since it uses less digits than its factorization.

79912752640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845 (or 829 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 52.

The spelling of 79912752640 in words is "seventy-nine billion, nine hundred twelve million, seven hundred fifty-two thousand, six hundred forty".