86805798975 has 72 divisors (see below), whose sum is σ = 182492650080. Its totient is φ = 38610120960.

The previous prime is 86805798931. The next prime is 86805799009. The reversal of 86805798975 is 57989750868.

It is not a de Polignac number, because 86805798975 - 2⁸ = 86805798719 is a prime.

It is a super-2 number, since 2×86805798975² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 686520 + ... + 803069.

It is an arithmetic number, because the mean of its divisors is an integer number (2534620140).

Almost surely, 2^86805798975 is an apocalyptic number.

86805798975 is an abundant number, since it is smaller than the sum of its proper divisors (95686851105).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

86805798975 is a wasteful number, since it uses less digits than its factorization.

86805798975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1489649 (or 1489641 counting only the distinct ones).

The product of its (nonzero) digits is 304819200, while the sum is 72.

The spelling of 86805798975 in words is "eighty-six billion, eight hundred five million, seven hundred ninety-eight thousand, nine hundred seventy-five".