681415264 has 24 divisors (see below), whose sum is σ = 1342125288. Its totient is φ = 340558080.

The previous prime is 681415237. The next prime is 681415271. The reversal of 681415264 is 462514186.

It is a congruent number.

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, 123084 + ... + 128500.

It is an arithmetic number, because the mean of its divisors is an integer number (55921887).

Almost surely, 2^681415264 is an apocalyptic number.

It is an amenable number.

681415264 is a deficient number, since it is larger than the sum of its proper divisors (660710024).

681415264 is a wasteful number, since it uses less digits than its factorization.

681415264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9358 (or 9350 counting only the distinct ones).

The product of its digits is 46080, while the sum is 37.

The square root of 681415264 is about 26103.9319643612. The cubic root of 681415264 is about 879.9755778346.

The spelling of 681415264 in words is "six hundred eighty-one million, four hundred fifteen thousand, two hundred sixty-four".