14639423509 has 2 divisors, whose sum is σ = 14639423510. Its totient is φ = 14639423508.

The previous prime is 14639423459. The next prime is 14639423521. The reversal of 14639423509 is 90532493641.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12154401009 + 2485022500 = 110247^2 + 49850^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14639423509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14639723509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7319711754 + 7319711755.

It is an arithmetic number, because the mean of its divisors is an integer number (7319711755).

Almost surely, 2^14639423509 is an apocalyptic number.

It is an amenable number.

14639423509 is a deficient number, since it is larger than the sum of its proper divisors (1).

14639423509 is an equidigital number, since it uses as much as digits as its factorization.

14639423509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 699840, while the sum is 46.

The spelling of 14639423509 in words is "fourteen billion, six hundred thirty-nine million, four hundred twenty-three thousand, five hundred nine".