79905521488 has 20 divisors (see below), whose sum is σ = 166725944308. Its totient is φ = 36879471360.

The previous prime is 79905521467. The next prime is 79905521491. The reversal of 79905521488 is 88412550997.

It can be written as a sum of positive squares in 2 ways, for example, as 53633001744 + 26272519744 = 231588^2 + 162088^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192080373 + ... + 192080788.

Almost surely, 2^79905521488 is an apocalyptic number.

It is an amenable number.

79905521488 is an abundant number, since it is smaller than the sum of its proper divisors (86820422820).

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

79905521488 is a wasteful number, since it uses less digits than its factorization.

79905521488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384161182 (or 384161176 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 58.

The spelling of 79905521488 in words is "seventy-nine billion, nine hundred five million, five hundred twenty-one thousand, four hundred eighty-eight".