681822650 has 24 divisors (see below), whose sum is σ = 1268892000. Its totient is φ = 272578160.

The previous prime is 681822641. The next prime is 681822653. The reversal of 681822650 is 56228186.

681822650 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 (681822653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 147677 + ... + 152223.

It is an arithmetic number, because the mean of its divisors is an integer number (52870500).

Almost surely, 2^681822650 is an apocalyptic number.

681822650 is a deficient number, since it is larger than the sum of its proper divisors (587069350).

681822650 is a wasteful number, since it uses less digits than its factorization.

681822650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7558 (or 7553 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 681822650 is about 26111.7339523824. The cubic root of 681822650 is about 880.1509081763.

The spelling of 681822650 in words is "six hundred eighty-one million, eight hundred twenty-two thousand, six hundred fifty".