681736930560 has 216 divisors, whose sum is σ = 2695701765120. Its totient is φ = 155825565696.

The previous prime is 681736930541. The next prime is 681736930561. The reversal of 681736930560 is 65039637186.

681736930560 is a `hidden beast` number, since 6 + 8 + 1 + 73 + 6 + 9 + 3 + 0 + 560 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 681736930497 and 681736930506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681736930561) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4146400 + ... + 4307679.

Almost surely, 2^681736930560 is an apocalyptic number.

681736930560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

681736930560 is an abundant number, since it is smaller than the sum of its proper divisors (2013964834560).

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

681736930560 is a wasteful number, since it uses less digits than its factorization.

681736930560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8454113 (or 8454096 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 54.

The spelling of 681736930560 in words is "six hundred eighty-one billion, seven hundred thirty-six million, nine hundred thirty thousand, five hundred sixty".