681725268 has 192 divisors, whose sum is σ = 2104453120. Its totient is φ = 186810624.

The previous prime is 681725257. The next prime is 681725293. The reversal of 681725268 is 862527186.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2177880 + ... + 2178192.

Almost surely, 2^681725268 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 681725268, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1052226560).

681725268 is an abundant number, since it is smaller than the sum of its proper divisors (1422727852).

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

681725268 is a wasteful number, since it uses less digits than its factorization.

681725268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443 (or 435 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 681725268 is about 26109.8691685730. The cubic root of 681725268 is about 880.1090033707.

The spelling of 681725268 in words is "six hundred eighty-one million, seven hundred twenty-five thousand, two hundred sixty-eight".