681110012 has 24 divisors (see below), whose sum is σ = 1300983600. Its totient is φ = 309432960.

The previous prime is 681109939. The next prime is 681110033. The reversal of 681110012 is 210011186.

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, 131618 + ... + 136694.

It is an arithmetic number, because the mean of its divisors is an integer number (54207650).

Almost surely, 2^681110012 is an apocalyptic number.

It is an amenable number.

681110012 is a deficient number, since it is larger than the sum of its proper divisors (619873588).

681110012 is a wasteful number, since it uses less digits than its factorization.

681110012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8141 (or 8139 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 20.

The square root of 681110012 is about 26098.0844507791. The cubic root of 681110012 is about 879.8441580091.

Adding to 681110012 its reverse (210011186), we get a palindrome (891121198).

The spelling of 681110012 in words is "six hundred eighty-one million, one hundred ten thousand, twelve".