86172513973 has 32 divisors (see below), whose sum is σ = 106768569600. Its totient is φ = 67725365760.

The previous prime is 86172513961. The next prime is 86172513991. The reversal of 86172513973 is 37931527168.

It is not a de Polignac number, because 86172513973 - 2²⁵ = 86138959541 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86172513973.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86172513373) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9518353 + ... + 9527401.

It is an arithmetic number, because the mean of its divisors is an integer number (3336517800).

Almost surely, 2^86172513973 is an apocalyptic number.

It is an amenable number.

86172513973 is a deficient number, since it is larger than the sum of its proper divisors (20596055627).

86172513973 is a wasteful number, since it uses less digits than its factorization.

86172513973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9757.

The product of its digits is 1905120, while the sum is 52.

The spelling of 86172513973 in words is "eighty-six billion, one hundred seventy-two million, five hundred thirteen thousand, nine hundred seventy-three".