681675613264 has 20 divisors (see below), whose sum is σ = 1390259475040. Its totient is φ = 322898974560.

The previous prime is 681675613231. The next prime is 681675613319. The reversal of 681675613264 is 462316576186.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1121176692 + ... + 1121177299.

It is an arithmetic number, because the mean of its divisors is an integer number (69512973752).

Almost surely, 2^681675613264 is an apocalyptic number.

It is an amenable number.

681675613264 is an abundant number, since it is smaller than the sum of its proper divisors (708583861776).

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

681675613264 is a wasteful number, since it uses less digits than its factorization.

681675613264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2242354018 (or 2242354012 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 55.

The spelling of 681675613264 in words is "six hundred eighty-one billion, six hundred seventy-five million, six hundred thirteen thousand, two hundred sixty-four".