79197797952 has 672 divisors, whose sum is σ = 293007117312. Its totient is φ = 20652558336.

The previous prime is 79197797947. The next prime is 79197797993. The reversal of 79197797952 is 25979779197.

It is a tau number, because it is divible by the number of its divisors (672).

It is a Harshad number since it is a multiple of its sum of digits (72).

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, 151429563 + ... + 151430085.

It is an arithmetic number, because the mean of its divisors is an integer number (436022496).

Almost surely, 2^79197797952 is an apocalyptic number.

79197797952 is a gapful number since it is divisible by the number (72) 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 79197797952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146503558656).

79197797952 is an abundant number, since it is smaller than the sum of its proper divisors (213809319360).

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

79197797952 is a wasteful number, since it uses less digits than its factorization.

79197797952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677 (or 655 counting only the distinct ones).

The product of its digits is 157529610, while the sum is 72.

The spelling of 79197797952 in words is "seventy-nine billion, one hundred ninety-seven million, seven hundred ninety-seven thousand, nine hundred fifty-two".