681235613807 has 8 divisors (see below), whose sum is σ = 779918485632. Its totient is φ = 582893616600.

The previous prime is 681235613789. The next prime is 681235613819. The reversal of 681235613807 is 708316532186.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 681235613807 - 2⁸ = 681235613551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681235613827) 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, 85214369 + ... + 85222362.

It is an arithmetic number, because the mean of its divisors is an integer number (97489810704).

Almost surely, 2^681235613807 is an apocalyptic number.

681235613807 is a deficient number, since it is larger than the sum of its proper divisors (98682871825).

681235613807 is a wasteful number, since it uses less digits than its factorization.

681235613807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170437309.

The product of its (nonzero) digits is 1451520, while the sum is 50.

The spelling of 681235613807 in words is "six hundred eighty-one billion, two hundred thirty-five million, six hundred thirteen thousand, eight hundred seven".