86172397684 has 24 divisors (see below), whose sum is σ = 156364371968. Its totient is φ = 41509329120.

The previous prime is 86172397637. The next prime is 86172397687. The reversal of 86172397684 is 48679327168.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86172397687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1530507 + ... + 1585810.

Almost surely, 2^86172397684 is an apocalyptic number.

It is an amenable number.

86172397684 is a deficient number, since it is larger than the sum of its proper divisors (70191974284).

86172397684 is a wasteful number, since it uses less digits than its factorization.

86172397684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3116575 (or 3116573 counting only the distinct ones).

The product of its digits is 24385536, while the sum is 61.

The spelling of 86172397684 in words is "eighty-six billion, one hundred seventy-two million, three hundred ninety-seven thousand, six hundred eighty-four".