681775580 has 12 divisors (see below), whose sum is σ = 1431728760. Its totient is φ = 272710224.

The previous prime is 681775573. The next prime is 681775631. The reversal of 681775580 is 85577186.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17044370 + ... + 17044409.

It is an arithmetic number, because the mean of its divisors is an integer number (119310730).

Almost surely, 2^681775580 is an apocalyptic number.

It is an amenable number.

681775580 is an abundant number, since it is smaller than the sum of its proper divisors (749953180).

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

681775580 is a wasteful number, since it uses less digits than its factorization.

681775580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34088788 (or 34088786 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 47.

The square root of 681775580 is about 26110.8326179002. The cubic root of 681775580 is about 880.1306538102.

The spelling of 681775580 in words is "six hundred eighty-one million, seven hundred seventy-five thousand, five hundred eighty".