681375894 has 16 divisors (see below), whose sum is σ = 1363010160. Its totient is φ = 227082240.

The previous prime is 681375889. The next prime is 681375907. The reversal of 681375894 is 498573186.

681375894 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 49302 + ... + 61590.

It is an arithmetic number, because the mean of its divisors is an integer number (85188135).

Almost surely, 2^681375894 is an apocalyptic number.

681375894 is an abundant number, since it is smaller than the sum of its proper divisors (681634266).

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

681375894 is a wasteful number, since it uses less digits than its factorization.

681375894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21535.

The product of its digits is 1451520, while the sum is 51.

The square root of 681375894 is about 26103.1778525144. The cubic root of 681375894 is about 879.9586301144.

The spelling of 681375894 in words is "six hundred eighty-one million, three hundred seventy-five thousand, eight hundred ninety-four".