79861791159 has 20 divisors (see below), whose sum is σ = 119339594440. Its totient is φ = 53223395760.

The previous prime is 79861791131. The next prime is 79861791161. The reversal of 79861791159 is 95119716897.

It is a happy number.

79861791159 is a `hidden beast` number, since 7 + 9 + 8 + 617 + 9 + 1 + 1 + 5 + 9 = 666.

It is not a de Polignac number, because 79861791159 - 2¹³ = 79861782967 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79861791096 and 79861791105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79861791109) 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 19 ways as a sum of consecutive naturals, for example, 81249 + ... + 407829.

It is an arithmetic number, because the mean of its divisors is an integer number (5966979722).

Almost surely, 2^79861791159 is an apocalyptic number.

79861791159 is a deficient number, since it is larger than the sum of its proper divisors (39477803281).

79861791159 is a wasteful number, since it uses less digits than its factorization.

79861791159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329612 (or 329603 counting only the distinct ones).

The product of its digits is 8573040, while the sum is 63.

The spelling of 79861791159 in words is "seventy-nine billion, eight hundred sixty-one million, seven hundred ninety-one thousand, one hundred fifty-nine".