681934356 has 24 divisors (see below), whose sum is σ = 1767978240. Its totient is φ = 227311416.

The previous prime is 681934303. The next prime is 681934387. The reversal of 681934356 is 653439186.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3156996 + ... + 3157211.

It is an arithmetic number, because the mean of its divisors is an integer number (73665760).

Almost surely, 2^681934356 is an apocalyptic number.

It is an amenable number.

681934356 is an abundant number, since it is smaller than the sum of its proper divisors (1086043884).

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

681934356 is a wasteful number, since it uses less digits than its factorization.

681934356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6314220 (or 6314212 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The square root of 681934356 is about 26113.8728648203. The cubic root of 681934356 is about 880.1989718815.

The spelling of 681934356 in words is "six hundred eighty-one million, nine hundred thirty-four thousand, three hundred fifty-six".