12944566840 has 16 divisors (see below), whose sum is σ = 29125275480. Its totient is φ = 5177826720.

The previous prime is 12944566799. The next prime is 12944566847. The reversal of 12944566840 is 4866544921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12944566847) 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, 161807046 + ... + 161807125.

Almost surely, 2^12944566840 is an apocalyptic number.

12944566840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12944566840 is an abundant number, since it is smaller than the sum of its proper divisors (16180708640).

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

12944566840 is a wasteful number, since it uses less digits than its factorization.

12944566840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323614182 (or 323614178 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 49.

The spelling of 12944566840 in words is "twelve billion, nine hundred forty-four million, five hundred sixty-six thousand, eight hundred forty".