12644181670 has 16 divisors (see below), whose sum is σ = 22801606128. Its totient is φ = 5048321760.

The previous prime is 12644181661. The next prime is 12644181677. The reversal of 12644181670 is 7618144621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12644181677) 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, 1163184 + ... + 1174003.

It is an arithmetic number, because the mean of its divisors is an integer number (1425100383).

Almost surely, 2^12644181670 is an apocalyptic number.

12644181670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12644181670 is a deficient number, since it is larger than the sum of its proper divisors (10157424458).

12644181670 is a wasteful number, since it uses less digits than its factorization.

12644181670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2337735.

The product of its (nonzero) digits is 64512, while the sum is 40.

The spelling of 12644181670 in words is "twelve billion, six hundred forty-four million, one hundred eighty-one thousand, six hundred seventy".