14639423521 has 2 divisors, whose sum is σ = 14639423522. Its totient is φ = 14639423520.

The previous prime is 14639423509. The next prime is 14639423527. The reversal of 14639423521 is 12532493641.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14425211025 + 214212496 = 120105^2 + 14636^2 .

It is an emirp because it is prime and its reverse (12532493641) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 14639423521 - 2¹⁷ = 14639292449 is a prime.

It is not a weakly prime, because it can be changed into another prime (14639423527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7319711760 + 7319711761.

It is an arithmetic number, because the mean of its divisors is an integer number (7319711761).

Almost surely, 2^14639423521 is an apocalyptic number.

It is an amenable number.

14639423521 is a deficient number, since it is larger than the sum of its proper divisors (1).

14639423521 is an equidigital number, since it uses as much as digits as its factorization.

14639423521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 40.

The spelling of 14639423521 in words is "fourteen billion, six hundred thirty-nine million, four hundred twenty-three thousand, five hundred twenty-one".