681346807340 has 24 divisors (see below), whose sum is σ = 1431065558832. Its totient is φ = 272493529920.

The previous prime is 681346807321. The next prime is 681346807343. The reversal of 681346807340 is 43708643186.

It is a super-2 number, since 2×681346807340² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (681346807343) 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, 2700806 + ... + 2942285.

It is an arithmetic number, because the mean of its divisors is an integer number (59627731618).

Almost surely, 2^681346807340 is an apocalyptic number.

It is an amenable number.

681346807340 is an abundant number, since it is smaller than the sum of its proper divisors (749718751492).

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

681346807340 is a wasteful number, since it uses less digits than its factorization.

681346807340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5649137 (or 5649135 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 50.

The spelling of 681346807340 in words is "six hundred eighty-one billion, three hundred forty-six million, eight hundred seven thousand, three hundred forty".