12944755621 has 16 divisors (see below), whose sum is σ = 15754811904. Its totient is φ = 10382448384.

The previous prime is 12944755619. The next prime is 12944755631. The reversal of 12944755621 is 12655744921.

It is not a de Polignac number, because 12944755621 - 2¹ = 12944755619 is a prime.

It is a super-2 number, since 2×12944755621² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12944755601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 293805 + ... + 334978.

It is an arithmetic number, because the mean of its divisors is an integer number (984675744).

Almost surely, 2^12944755621 is an apocalyptic number.

It is an amenable number.

12944755621 is a deficient number, since it is larger than the sum of its proper divisors (2810056283).

12944755621 is a wasteful number, since it uses less digits than its factorization.

12944755621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628980.

The product of its digits is 604800, while the sum is 46.

The spelling of 12944755621 in words is "twelve billion, nine hundred forty-four million, seven hundred fifty-five thousand, six hundred twenty-one".