86979746384 has 20 divisors (see below), whose sum is σ = 169122994260. Its totient is φ = 43335102720.

The previous prime is 86979746297. The next prime is 86979746387. The reversal of 86979746384 is 48364797968.

It can be written as a sum of positive squares in 2 ways, for example, as 57251089984 + 29728656400 = 239272^2 + 172420^2 .

It is a super-2 number, since 2×86979746384² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86979746387) 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 3 ways as a sum of consecutive naturals, for example, 9668519 + ... + 9677510.

It is an arithmetic number, because the mean of its divisors is an integer number (8456149713).

Almost surely, 2^86979746384 is an apocalyptic number.

It is an amenable number.

86979746384 is a deficient number, since it is larger than the sum of its proper divisors (82143247876).

86979746384 is a wasteful number, since it uses less digits than its factorization.

86979746384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19346318 (or 19346312 counting only the distinct ones).

The product of its digits is 438939648, while the sum is 71.

The spelling of 86979746384 in words is "eighty-six billion, nine hundred seventy-nine million, seven hundred forty-six thousand, three hundred eighty-four".