686231324730 has 64 divisors (see below), whose sum is σ = 2091371662080. Its totient is φ = 156852873792.

The previous prime is 686231324707. The next prime is 686231324759. The reversal of 686231324730 is 37423132686.

686231324730 is a `hidden beast` number, since 6 + 8 + 62 + 313 + 247 + 30 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 181540789 + ... + 181544568.

It is an arithmetic number, because the mean of its divisors is an integer number (32677682220).

Almost surely, 2^686231324730 is an apocalyptic number.

686231324730 is an abundant number, since it is smaller than the sum of its proper divisors (1405140337350).

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

686231324730 is a wasteful number, since it uses less digits than its factorization.

686231324730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363085380 (or 363085374 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 45.

The spelling of 686231324730 in words is "six hundred eighty-six billion, two hundred thirty-one million, three hundred twenty-four thousand, seven hundred thirty".