79788326920 has 16 divisors (see below), whose sum is σ = 179523735660. Its totient is φ = 31915330752.

The previous prime is 79788326911. The next prime is 79788326927. The reversal of 79788326920 is 2962388797.

It can be written as a sum of positive squares in 2 ways, for example, as 79626681124 + 161645796 = 282182^2 + 12714^2 .

It is a super-2 number, since 2×79788326920² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (79788326927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 997354047 + ... + 997354126.

Almost surely, 2^79788326920 is an apocalyptic number.

It is an amenable number.

79788326920 is an abundant number, since it is smaller than the sum of its proper divisors (99735408740).

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

79788326920 is a wasteful number, since it uses less digits than its factorization.

79788326920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1994708184 (or 1994708180 counting only the distinct ones).

The product of its (nonzero) digits is 18289152, while the sum is 61.

The spelling of 79788326920 in words is "seventy-nine billion, seven hundred eighty-eight million, three hundred twenty-six thousand, nine hundred twenty".