86172514691 has 4 divisors (see below), whose sum is σ = 88274283384. Its totient is φ = 84070746000.

The previous prime is 86172514627. The next prime is 86172514693. The reversal of 86172514691 is 19641527168.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 86172514691 - 2⁶ = 86172514627 is a prime.

It is a super-2 number, since 2×86172514691² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86172514693) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1050884285 + ... + 1050884366.

It is an arithmetic number, because the mean of its divisors is an integer number (22068570846).

Almost surely, 2^86172514691 is an apocalyptic number.

86172514691 is a deficient number, since it is larger than the sum of its proper divisors (2101768693).

86172514691 is a wasteful number, since it uses less digits than its factorization.

86172514691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2101768692.

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

The spelling of 86172514691 in words is "eighty-six billion, one hundred seventy-two million, five hundred fourteen thousand, six hundred ninety-one".