79787020864 has 112 divisors (see below), whose sum is σ = 164332603008. Its totient is φ = 38415024128.

The previous prime is 79787020801. The next prime is 79787020933. The reversal of 79787020864 is 46802078797.

It is a hoax number, since the sum of its digits (58) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 79787020799 and 79787020808.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47015664 + ... + 47017360.

It is an arithmetic number, because the mean of its divisors is an integer number (1467255384).

Almost surely, 2^79787020864 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 79787020864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82166301504).

79787020864 is an abundant number, since it is smaller than the sum of its proper divisors (84545582144).

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

79787020864 is a wasteful number, since it uses less digits than its factorization.

79787020864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2012 (or 2002 counting only the distinct ones).

The product of its (nonzero) digits is 9483264, while the sum is 58.

The spelling of 79787020864 in words is "seventy-nine billion, seven hundred eighty-seven million, twenty thousand, eight hundred sixty-four".