681795576 has 128 divisors (see below), whose sum is σ = 2361254400. Its totient is φ = 177085440.

The previous prime is 681795571. The next prime is 681795589. The reversal of 681795576 is 675597186.

681795576 is a `hidden beast` number, since 6 + 81 + 7 + 9 + 557 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681795571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3865 + ... + 37128.

It is an arithmetic number, because the mean of its divisors is an integer number (18447300).

Almost surely, 2^681795576 is an apocalyptic number.

681795576 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 681795576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1180627200).

681795576 is an abundant number, since it is smaller than the sum of its proper divisors (1679458824).

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

681795576 is a wasteful number, since it uses less digits than its factorization.

681795576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41026 (or 41016 counting only the distinct ones).

The product of its digits is 3175200, while the sum is 54.

The square root of 681795576 is about 26111.2155213043. The cubic root of 681795576 is about 880.1392582645.

The spelling of 681795576 in words is "six hundred eighty-one million, seven hundred ninety-five thousand, five hundred seventy-six".