681346680140 has 24 divisors (see below), whose sum is σ = 1635232032672. Its totient is φ = 233604576000.

The previous prime is 681346680121. The next prime is 681346680149. The reversal of 681346680140 is 41086643186.

681346680140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×681346680140³ (a number of 36 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (681346680149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2433380861 + ... + 2433381140.

It is an arithmetic number, because the mean of its divisors is an integer number (68134668028).

Almost surely, 2^681346680140 is an apocalyptic number.

It is an amenable number.

681346680140 is an abundant number, since it is smaller than the sum of its proper divisors (953885352532).

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

681346680140 is a wasteful number, since it uses less digits than its factorization.

681346680140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4866762017 (or 4866762015 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 47.

The spelling of 681346680140 in words is "six hundred eighty-one billion, three hundred forty-six million, six hundred eighty thousand, one hundred forty".