681110032 has 20 divisors (see below), whose sum is σ = 1397277756. Its totient is φ = 320522240.

The previous prime is 681109939. The next prime is 681110033. The reversal of 681110032 is 230011186.

It can be written as a sum of positive squares in 2 ways, for example, as 343138576 + 337971456 = 18524^2 + 18384^2 .

It is a junction number, because it is equal to n+sod(n) for n = 681109985 and 681110012.

It is not an unprimeable number, because it can be changed into a prime (681110033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1251769 + ... + 1252312.

Almost surely, 2^681110032 is an apocalyptic number.

It is an amenable number.

681110032 is an abundant number, since it is smaller than the sum of its proper divisors (716167724).

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

681110032 is a wasteful number, since it uses less digits than its factorization.

681110032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2504106 (or 2504100 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 681110032 is about 26098.0848339490. The cubic root of 681110032 is about 879.8441666210.

The spelling of 681110032 in words is "six hundred eighty-one million, one hundred ten thousand, thirty-two".