681968358 has 12 divisors (see below), whose sum is σ = 1477598148. Its totient is φ = 227322780.

The previous prime is 681968351. The next prime is 681968389. The reversal of 681968358 is 853869186.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681968351) 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, 18943548 + ... + 18943583.

It is an arithmetic number, because the mean of its divisors is an integer number (123133179).

Almost surely, 2^681968358 is an apocalyptic number.

681968358 is an abundant number, since it is smaller than the sum of its proper divisors (795629790).

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

681968358 is a wasteful number, since it uses less digits than its factorization.

681968358 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37887139 (or 37887136 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 54.

The square root of 681968358 is about 26114.5238899736. The cubic root of 681968358 is about 880.2136008692.

The spelling of 681968358 in words is "six hundred eighty-one million, nine hundred sixty-eight thousand, three hundred fifty-eight".