12440109973 has 2 divisors, whose sum is σ = 12440109974. Its totient is φ = 12440109972.

The previous prime is 12440109953. The next prime is 12440110049. The reversal of 12440109973 is 37990104421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11699018244 + 741091729 = 108162^2 + 27223^2 .

It is a cyclic number.

It is not a de Polignac number, because 12440109973 - 2²⁵ = 12406555541 is a prime.

It is a super-2 number, since 2×12440109973² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12440109923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6220054986 + 6220054987.

It is an arithmetic number, because the mean of its divisors is an integer number (6220054987).

Almost surely, 2^12440109973 is an apocalyptic number.

It is an amenable number.

12440109973 is a deficient number, since it is larger than the sum of its proper divisors (1).

12440109973 is an equidigital number, since it uses as much as digits as its factorization.

12440109973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 40.

The spelling of 12440109973 in words is "twelve billion, four hundred forty million, one hundred nine thousand, nine hundred seventy-three".