681858597339 has 6 divisors (see below), whose sum is σ = 984906862836. Its totient is φ = 454572398220.

The previous prime is 681858597337. The next prime is 681858597389. The reversal of 681858597339 is 933795858186.

681858597339 is a `hidden beast` number, since 6 + 8 + 1 + 8 + 585 + 9 + 7 + 3 + 39 = 666.

681858597339 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 681858597339 - 2¹ = 681858597337 is a prime.

It is a super-2 number, since 2×681858597339² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (681858597337) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37881033177 + ... + 37881033194.

It is an arithmetic number, because the mean of its divisors is an integer number (164151143806).

Almost surely, 2^681858597339 is an apocalyptic number.

681858597339 is a deficient number, since it is larger than the sum of its proper divisors (303048265497).

681858597339 is a wasteful number, since it uses less digits than its factorization.

681858597339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75762066377 (or 75762066374 counting only the distinct ones).

The product of its digits is 391910400, while the sum is 72.

The spelling of 681858597339 in words is "six hundred eighty-one billion, eight hundred fifty-eight million, five hundred ninety-seven thousand, three hundred thirty-nine".