12609810985 has 8 divisors (see below), whose sum is σ = 15132797640. Its totient is φ = 10087165824.

The previous prime is 12609810953. The next prime is 12609810989. The reversal of 12609810985 is 58901890621.

It can be written as a sum of positive squares in 4 ways, for example, as 52591504 + 12557219481 = 7252^2 + 112059^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12609810985 - 2⁵ = 12609810953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12609810989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4461 + ... + 158869.

It is an arithmetic number, because the mean of its divisors is an integer number (1891599705).

Almost surely, 2^12609810985 is an apocalyptic number.

It is an amenable number.

12609810985 is a deficient number, since it is larger than the sum of its proper divisors (2522986655).

12609810985 is a wasteful number, since it uses less digits than its factorization.

12609810985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170747.

The product of its (nonzero) digits is 311040, while the sum is 49.

The spelling of 12609810985 in words is "twelve billion, six hundred nine million, eight hundred ten thousand, nine hundred eighty-five".