681592870 has 32 divisors (see below), whose sum is σ = 1403032896. Its totient is φ = 233539200.

The previous prime is 681592853. The next prime is 681592937. The reversal of 681592870 is 78295186.

It is a self number, because there is not a number n which added to its sum of digits gives 681592870.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 212680 + ... + 215860.

It is an arithmetic number, because the mean of its divisors is an integer number (43844778).

Almost surely, 2^681592870 is an apocalyptic number.

681592870 is an abundant number, since it is smaller than the sum of its proper divisors (721440026).

681592870 is a wasteful number, since it uses less digits than its factorization.

681592870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6256.

The product of its (nonzero) digits is 241920, while the sum is 46.

The square root of 681592870 is about 26107.3336440166. Note that the first 3 decimals coincide. The cubic root of 681592870 is about 880.0520243004.

The spelling of 681592870 in words is "six hundred eighty-one million, five hundred ninety-two thousand, eight hundred seventy".