681446985 has 8 divisors (see below), whose sum is σ = 1090315200. Its totient is φ = 363438384.

The previous prime is 681446977. The next prime is 681446993. The reversal of 681446985 is 589644186.

It is an interprime number because it is at equal distance from previous prime (681446977) and next prime (681446993).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 681446985 - 2³ = 681446977 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 22714885 + ... + 22714914.

It is an arithmetic number, because the mean of its divisors is an integer number (136289400).

Almost surely, 2^681446985 is an apocalyptic number.

It is an amenable number.

681446985 is a deficient number, since it is larger than the sum of its proper divisors (408868215).

681446985 is a wasteful number, since it uses less digits than its factorization.

681446985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45429807.

The product of its digits is 1658880, while the sum is 51.

The square root of 681446985 is about 26104.5395477492. The cubic root of 681446985 is about 879.9892323924.

The spelling of 681446985 in words is "six hundred eighty-one million, four hundred forty-six thousand, nine hundred eighty-five".