86172516155 has 24 divisors (see below), whose sum is σ = 113682211776. Its totient is φ = 62659921280.

The previous prime is 86172516127. The next prime is 86172516203. The reversal of 86172516155 is 55161527168.

It is not a de Polignac number, because 86172516155 - 2³⁰ = 85098774331 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5305607 + ... + 5321823.

It is an arithmetic number, because the mean of its divisors is an integer number (4736758824).

Almost surely, 2^86172516155 is an apocalyptic number.

86172516155 is a deficient number, since it is larger than the sum of its proper divisors (27509695621).

86172516155 is a wasteful number, since it uses less digits than its factorization.

86172516155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25027 (or 25016 counting only the distinct ones).

The product of its digits is 504000, while the sum is 47.

The spelling of 86172516155 in words is "eighty-six billion, one hundred seventy-two million, five hundred sixteen thousand, one hundred fifty-five".