681130813156 has 12 divisors (see below), whose sum is σ = 1205371945260. Its totient is φ = 336738828800.

The previous prime is 681130813147. The next prime is 681130813159. The reversal of 681130813156 is 651318031186.

It can be written as a sum of positive squares in 2 ways, for example, as 472428027556 + 208702785600 = 687334^2 + 456840^2 .

It is not an unprimeable number, because it can be changed into a prime (681130813159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 956644045 + ... + 956644756.

It is an arithmetic number, because the mean of its divisors is an integer number (100447662105).

Almost surely, 2^681130813156 is an apocalyptic number.

It is an amenable number.

681130813156 is a deficient number, since it is larger than the sum of its proper divisors (524241132104).

681130813156 is a wasteful number, since it uses less digits than its factorization.

681130813156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1913288894 (or 1913288892 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 43.

The spelling of 681130813156 in words is "six hundred eighty-one billion, one hundred thirty million, eight hundred thirteen thousand, one hundred fifty-six".