86171237971 has 32 divisors (see below), whose sum is σ = 109836518400. Its totient is φ = 65754944640.

The previous prime is 86171237969. The next prime is 86171237987. The reversal of 86171237971 is 17973217168.

It is not a de Polignac number, because 86171237971 - 2¹ = 86171237969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86171237071) 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, 2407476 + ... + 2443006.

It is an arithmetic number, because the mean of its divisors is an integer number (3432391200).

Almost surely, 2^86171237971 is an apocalyptic number.

86171237971 is a deficient number, since it is larger than the sum of its proper divisors (23665280429).

86171237971 is a wasteful number, since it uses less digits than its factorization.

86171237971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36499.

The product of its digits is 889056, while the sum is 52.

The spelling of 86171237971 in words is "eighty-six billion, one hundred seventy-one million, two hundred thirty-seven thousand, nine hundred seventy-one".