681009580 has 12 divisors (see below), whose sum is σ = 1430120160. Its totient is φ = 272403824.

The previous prime is 681009557. The next prime is 681009587. The reversal of 681009580 is 85900186.

It is not an unprimeable number, because it can be changed into a prime (681009587) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17025220 + ... + 17025259.

It is an arithmetic number, because the mean of its divisors is an integer number (119176680).

Almost surely, 2^681009580 is an apocalyptic number.

It is an amenable number.

681009580 is an abundant number, since it is smaller than the sum of its proper divisors (749110580).

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

681009580 is a wasteful number, since it uses less digits than its factorization.

681009580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34050488 (or 34050486 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 37.

The square root of 681009580 is about 26096.1602539531. The cubic root of 681009580 is about 879.8009105403.

The spelling of 681009580 in words is "six hundred eighty-one million, nine thousand, five hundred eighty".