79747650920 has 128 divisors (see below), whose sum is σ = 209518272000. Its totient is φ = 27307058688.

The previous prime is 79747650859. The next prime is 79747650973. The reversal of 79747650920 is 2905674797.

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (56).

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, 12166364 + ... + 12172916.

It is an arithmetic number, because the mean of its divisors is an integer number (1636861500).

Almost surely, 2^79747650920 is an apocalyptic number.

79747650920 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 79747650920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104759136000).

79747650920 is an abundant number, since it is smaller than the sum of its proper divisors (129770621080).

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

79747650920 is a wasteful number, since it uses less digits than its factorization.

79747650920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7472 (or 7454 counting only the distinct ones).

The product of its (nonzero) digits is 6667920, while the sum is 56.

The spelling of 79747650920 in words is "seventy-nine billion, seven hundred forty-seven million, six hundred fifty thousand, nine hundred twenty".