686712820234 has 32 divisors (see below), whose sum is σ = 1189095417216. Its totient is φ = 291338203200.

The previous prime is 686712820193. The next prime is 686712820273. The reversal of 686712820234 is 432028217686.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8220444 + ... + 8303560.

It is an arithmetic number, because the mean of its divisors is an integer number (37159231788).

Almost surely, 2^686712820234 is an apocalyptic number.

686712820234 is a deficient number, since it is larger than the sum of its proper divisors (502382596982).

686712820234 is a wasteful number, since it uses less digits than its factorization.

686712820234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89070.

The product of its (nonzero) digits is 1548288, while the sum is 49.

The spelling of 686712820234 in words is "six hundred eighty-six billion, seven hundred twelve million, eight hundred twenty thousand, two hundred thirty-four".