86181572237 has 16 divisors (see below), whose sum is σ = 94105809600. Its totient is φ = 78830149104.

The previous prime is 86181572219. The next prime is 86181572291. The reversal of 86181572237 is 73227518168.

It is not a de Polignac number, because 86181572237 - 2²² = 86177377933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86181502237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17723 + ... + 415544.

It is an arithmetic number, because the mean of its divisors is an integer number (5881613100).

Almost surely, 2^86181572237 is an apocalyptic number.

It is an amenable number.

86181572237 is a deficient number, since it is larger than the sum of its proper divisors (7924237363).

86181572237 is an equidigital number, since it uses as much as digits as its factorization.

86181572237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433353 (or 433315 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 50.

The spelling of 86181572237 in words is "eighty-six billion, one hundred eighty-one million, five hundred seventy-two thousand, two hundred thirty-seven".