681351989760 has 1600 divisors, whose sum is σ = 2829857627520. Its totient is φ = 155271168000.

The previous prime is 681351989723. The next prime is 681351989767. The reversal of 681351989760 is 67989153186.

It is a super-2 number, since 2×681351989760² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (681351989767) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 2714549635 + ... + 2714549885.

Almost surely, 2^681351989760 is an apocalyptic number.

681351989760 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 681351989760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1414928813760).

681351989760 is an abundant number, since it is smaller than the sum of its proper divisors (2148505637760).

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

681351989760 is a wasteful number, since it uses less digits than its factorization.

681351989760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371 (or 346 counting only the distinct ones).

The product of its (nonzero) digits is 19595520, while the sum is 63.

The spelling of 681351989760 in words is "six hundred eighty-one billion, three hundred fifty-one million, nine hundred eighty-nine thousand, seven hundred sixty".