14644639993 has 2 divisors, whose sum is σ = 14644639994. Its totient is φ = 14644639992.

The previous prime is 14644639991. The next prime is 14644640057. The reversal of 14644639993 is 39993644641.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14058370624 + 586269369 = 118568^2 + 24213^2 .

It is a cyclic number.

It is not a de Polignac number, because 14644639993 - 2¹ = 14644639991 is a prime.

Together with 14644639991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (14644639991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7322319996 + 7322319997.

It is an arithmetic number, because the mean of its divisors is an integer number (7322319997).

Almost surely, 2^14644639993 is an apocalyptic number.

It is an amenable number.

14644639993 is a deficient number, since it is larger than the sum of its proper divisors (1).

14644639993 is an equidigital number, since it uses as much as digits as its factorization.

14644639993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15116544, while the sum is 58.

The spelling of 14644639993 in words is "fourteen billion, six hundred forty-four million, six hundred thirty-nine thousand, nine hundred ninety-three".