12944577905 has 64 divisors (see below), whose sum is σ = 18897435648. Its totient is φ = 8320942080.

The previous prime is 12944577901. The next prime is 12944577913. The reversal of 12944577905 is 50977544921.

It is not a de Polignac number, because 12944577905 - 2² = 12944577901 is a prime.

It is a super-2 number, since 2×12944577905² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12944577901) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10635857 + ... + 10637073.

It is an arithmetic number, because the mean of its divisors is an integer number (295272432).

Almost surely, 2^12944577905 is an apocalyptic number.

It is an amenable number.

12944577905 is a deficient number, since it is larger than the sum of its proper divisors (5952857743).

12944577905 is a wasteful number, since it uses less digits than its factorization.

12944577905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1506.

The product of its (nonzero) digits is 3175200, while the sum is 53.

The spelling of 12944577905 in words is "twelve billion, nine hundred forty-four million, five hundred seventy-seven thousand, nine hundred five".