79965235658880 has 768 divisors, whose sum is σ = 328049716176000. Its totient is φ = 17693242490880.

The previous prime is 79965235658857. The next prime is 79965235658897. The reversal of 79965235658880 is 8885653256997.

It is a happy number.

79965235658880 is a `hidden beast` number, since 7 + 9 + 9 + 6 + 5 + 23 + 5 + 6 + 588 + 8 + 0 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 79965235658880.

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, 72762111 + ... + 73852929.

Almost surely, 2^{79965235658880} 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 79965235658880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164024858088000).

79965235658880 is an abundant number, since it is smaller than the sum of its proper divisors (248084480517120).

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

79965235658880 is a wasteful number, since it uses less digits than its factorization.

79965235658880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1090957 (or 1090942 counting only the distinct ones).

The product of its (nonzero) digits is 7838208000, while the sum is 81.

The spelling of 79965235658880 in words is "seventy-nine trillion, nine hundred sixty-five billion, two hundred thirty-five million, six hundred fifty-eight thousand, eight hundred eighty".