686253862064 has 20 divisors (see below), whose sum is σ = 1329757687680. Its totient is φ = 343090587840.

The previous prime is 686253862057. The next prime is 686253862087. The reversal of 686253862064 is 460268352686.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2115344 + ... + 2418095.

It is an arithmetic number, because the mean of its divisors is an integer number (66487884384).

Almost surely, 2^686253862064 is an apocalyptic number.

It is an amenable number.

686253862064 is a deficient number, since it is larger than the sum of its proper divisors (643503825616).

686253862064 is a wasteful number, since it uses less digits than its factorization.

686253862064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4542908 (or 4542902 counting only the distinct ones).

The product of its (nonzero) digits is 19906560, while the sum is 56.

The spelling of 686253862064 in words is "six hundred eighty-six billion, two hundred fifty-three million, eight hundred sixty-two thousand, sixty-four".