86172513809 has 4 divisors (see below), whose sum is σ = 86194894320. Its totient is φ = 86150133300.

The previous prime is 86172513799. The next prime is 86172513883. The reversal of 86172513809 is 90831527168.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 86172513809 - 2⁴ = 86172513793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86172513509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11184479 + ... + 11192180.

It is an arithmetic number, because the mean of its divisors is an integer number (21548723580).

Almost surely, 2^86172513809 is an apocalyptic number.

It is an amenable number.

86172513809 is a deficient number, since it is larger than the sum of its proper divisors (22380511).

86172513809 is a wasteful number, since it uses less digits than its factorization.

86172513809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22380510.

The product of its (nonzero) digits is 725760, while the sum is 50.

The spelling of 86172513809 in words is "eighty-six billion, one hundred seventy-two million, five hundred thirteen thousand, eight hundred nine".