79111921115520 has 1152 divisors, whose sum is σ = 297132082790400. Its totient is φ = 19383326146560.

The previous prime is 79111921115449. The next prime is 79111921115533. The reversal of 79111921115520 is 2551112911197.

79111921115520 is a `hidden beast` number, since 7 + 9 + 1 + 1 + 1 + 9 + 2 + 1 + 115 + 520 = 666.

It is a tau number, because it is divible by the number of its divisors (1152).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 37476039265 + ... + 37476041375.

It is an arithmetic number, because the mean of its divisors is an integer number (257927155200).

Almost surely, 2^{79111921115520} 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 79111921115520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148566041395200).

79111921115520 is an abundant number, since it is smaller than the sum of its proper divisors (218020161674880).

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

79111921115520 is a wasteful number, since it uses less digits than its factorization.

79111921115520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2696 (or 2664 counting only the distinct ones).

The product of its (nonzero) digits is 56700, while the sum is 45.

The spelling of 79111921115520 in words is "seventy-nine trillion, one hundred eleven billion, nine hundred twenty-one million, one hundred fifteen thousand, five hundred twenty".