86891712579 has 32 divisors (see below), whose sum is σ = 152191296000. Its totient is φ = 47940252192.

The previous prime is 86891712541. The next prime is 86891712613. The reversal of 86891712579 is 97521719868.

It is not a de Polignac number, because 86891712579 - 2¹⁶ = 86891647043 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (86891712529) 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, 7921149 + ... + 7932110.

It is an arithmetic number, because the mean of its divisors is an integer number (4755978000).

Almost surely, 2^86891712579 is an apocalyptic number.

86891712579 is a deficient number, since it is larger than the sum of its proper divisors (65299583421).

86891712579 is a wasteful number, since it uses less digits than its factorization.

86891712579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15853304 (or 15853298 counting only the distinct ones).

The product of its digits is 15240960, while the sum is 63.

The spelling of 86891712579 in words is "eighty-six billion, eight hundred ninety-one million, seven hundred twelve thousand, five hundred seventy-nine".