686375399286 has 48 divisors (see below), whose sum is σ = 1517408201088. Its totient is φ = 224165376000.

The previous prime is 686375399273. The next prime is 686375399291. The reversal of 686375399286 is 682993573686.

686375399286 is a `hidden beast` number, since 6 + 8 + 6 + 3 + 7 + 539 + 9 + 2 + 86 = 666.

It is a super-2 number, since 2×686375399286² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 933990 + ... + 1498361.

It is an arithmetic number, because the mean of its divisors is an integer number (31612670856).

Almost surely, 2^686375399286 is an apocalyptic number.

686375399286 is an abundant number, since it is smaller than the sum of its proper divisors (831032801802).

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

686375399286 is a wasteful number, since it uses less digits than its factorization.

686375399286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2432677 (or 2432674 counting only the distinct ones).

The product of its digits is 705438720, while the sum is 72.

The spelling of 686375399286 in words is "six hundred eighty-six billion, three hundred seventy-five million, three hundred ninety-nine thousand, two hundred eighty-six".