79906796640 has 576 divisors, whose sum is σ = 303957868032. Its totient is φ = 18953625600.

The previous prime is 79906796611. The next prime is 79906796653. The reversal of 79906796640 is 4669760997.

It is a super-2 number, since 2×79906796640² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 255293124 + ... + 255293436.

It is an arithmetic number, because the mean of its divisors is an integer number (527704632).

Almost surely, 2^79906796640 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 79906796640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151978934016).

79906796640 is an abundant number, since it is smaller than the sum of its proper divisors (224051071392).

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

79906796640 is a wasteful number, since it uses less digits than its factorization.

79906796640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643 (or 632 counting only the distinct ones).

The product of its (nonzero) digits is 30862944, while the sum is 63.

The spelling of 79906796640 in words is "seventy-nine billion, nine hundred six million, seven hundred ninety-six thousand, six hundred forty".