681940150 has 24 divisors (see below), whose sum is σ = 1278103464. Its totient is φ = 270691200.

The previous prime is 681940141. The next prime is 681940151. The reversal of 681940150 is 51049186.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681940151) 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, 45507 + ... + 58606.

It is an arithmetic number, because the mean of its divisors is an integer number (53254311).

Almost surely, 2^681940150 is an apocalyptic number.

681940150 is a deficient number, since it is larger than the sum of its proper divisors (596163314).

681940150 is a wasteful number, since it uses less digits than its factorization.

681940150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104256 (or 104251 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 681940150 is about 26113.9838017871. The cubic root of 681940150 is about 880.2014647208.

The spelling of 681940150 in words is "six hundred eighty-one million, nine hundred forty thousand, one hundred fifty".