79612921191 has 16 divisors (see below), whose sum is σ = 106479182304. Its totient is φ = 52911089664.

The previous prime is 79612921189. The next prime is 79612921229. The reversal of 79612921191 is 19112921697.

It is not a de Polignac number, because 79612921191 - 2¹ = 79612921189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79612921191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79612921121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2959795 + ... + 2986571.

It is an arithmetic number, because the mean of its divisors is an integer number (6654948894).

Almost surely, 2^79612921191 is an apocalyptic number.

79612921191 is a deficient number, since it is larger than the sum of its proper divisors (26866261113).

79612921191 is a wasteful number, since it uses less digits than its factorization.

79612921191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29810.

The product of its digits is 122472, while the sum is 48.

The spelling of 79612921191 in words is "seventy-nine billion, six hundred twelve million, nine hundred twenty-one thousand, one hundred ninety-one".