681883993950 has 24 divisors (see below), whose sum is σ = 1691072305368. Its totient is φ = 181835731680.

The previous prime is 681883993937. The next prime is 681883993951. The reversal of 681883993950 is 59399388186.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681883993951) 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, 2272946497 + ... + 2272946796.

It is an arithmetic number, because the mean of its divisors is an integer number (70461346057).

Almost surely, 2^681883993950 is an apocalyptic number.

681883993950 is an abundant number, since it is smaller than the sum of its proper divisors (1009188311418).

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

681883993950 is a wasteful number, since it uses less digits than its factorization.

681883993950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4545893308 (or 4545893303 counting only the distinct ones).

The product of its (nonzero) digits is 100776960, while the sum is 69.

The spelling of 681883993950 in words is "six hundred eighty-one billion, eight hundred eighty-three million, nine hundred ninety-three thousand, nine hundred fifty".