79171552187 has 18 divisors (see below), whose sum is σ = 99726910668. Its totient is φ = 62641221552.

The previous prime is 79171552171. The next prime is 79171552189. The reversal of 79171552187 is 78125517197.

It is not a de Polignac number, because 79171552187 - 2⁴ = 79171552171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79171552189) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4772033 + ... + 4788594.

It is an arithmetic number, because the mean of its divisors is an integer number (5540383926).

Almost surely, 2^79171552187 is an apocalyptic number.

79171552187 is a deficient number, since it is larger than the sum of its proper divisors (20555358481).

79171552187 is a wasteful number, since it uses less digits than its factorization.

79171552187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9560667 (or 9560647 counting only the distinct ones).

The product of its digits is 1234800, while the sum is 53.

The spelling of 79171552187 in words is "seventy-nine billion, one hundred seventy-one million, five hundred fifty-two thousand, one hundred eighty-seven".