681562722 has 16 divisors (see below), whose sum is σ = 1388845440. Its totient is φ = 222900912.

The previous prime is 681562697. The next prime is 681562723. The reversal of 681562722 is 227265186.

681562722 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (681562723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1071322 + ... + 1071957.

It is an arithmetic number, because the mean of its divisors is an integer number (86802840).

Almost surely, 2^681562722 is an apocalyptic number.

681562722 is an abundant number, since it is smaller than the sum of its proper divisors (707282718).

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

681562722 is a wasteful number, since it uses less digits than its factorization.

681562722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2143337.

The product of its digits is 80640, while the sum is 39.

The square root of 681562722 is about 26106.7562519743. The cubic root of 681562722 is about 880.0390487149.

The spelling of 681562722 in words is "six hundred eighty-one million, five hundred sixty-two thousand, seven hundred twenty-two".