681199456 has 96 divisors (see below), whose sum is σ = 1592414208. Its totient is φ = 280696320.

The previous prime is 681199433. The next prime is 681199459. The reversal of 681199456 is 654991186.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681199459) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1826086 + ... + 1826458.

It is an arithmetic number, because the mean of its divisors is an integer number (16587648).

Almost surely, 2^681199456 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 681199456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (796207104).

681199456 is an abundant number, since it is smaller than the sum of its proper divisors (911214752).

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

681199456 is a wasteful number, since it uses less digits than its factorization.

681199456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684 (or 676 counting only the distinct ones).

The product of its digits is 466560, while the sum is 49.

The square root of 681199456 is about 26099.7980068812. The cubic root of 681199456 is about 879.8826703076.

The spelling of 681199456 in words is "six hundred eighty-one million, one hundred ninety-nine thousand, four hundred fifty-six".