79819923189 has 16 divisors (see below), whose sum is σ = 111081111552. Its totient is φ = 50887146288.

The previous prime is 79819923181. The next prime is 79819923247. The reversal of 79819923189 is 98132991897.

It is not a de Polignac number, because 79819923189 - 2³ = 79819923181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79819923181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144612 + ... + 424914.

It is an arithmetic number, because the mean of its divisors is an integer number (6942569472).

Almost surely, 2^79819923189 is an apocalyptic number.

It is an amenable number.

79819923189 is a deficient number, since it is larger than the sum of its proper divisors (31261188363).

79819923189 is a wasteful number, since it uses less digits than its factorization.

79819923189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284456.

The product of its digits is 17635968, while the sum is 66.

The spelling of 79819923189 in words is "seventy-nine billion, eight hundred nineteen million, nine hundred twenty-three thousand, one hundred eighty-nine".