14721860639 has 4 divisors (see below), whose sum is σ = 14776185120. Its totient is φ = 14667536160.

The previous prime is 14721860627. The next prime is 14721860749. The reversal of 14721860639 is 93606812741.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 14721860639 - 2²⁴ = 14705083423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 14721860593 and 14721860602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14721860239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27161834 + ... + 27162375.

It is an arithmetic number, because the mean of its divisors is an integer number (3694046280).

Almost surely, 2^14721860639 is an apocalyptic number.

14721860639 is a deficient number, since it is larger than the sum of its proper divisors (54324481).

14721860639 is an equidigital number, since it uses as much as digits as its factorization.

14721860639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54324480.

The product of its (nonzero) digits is 435456, while the sum is 47.

The spelling of 14721860639 in words is "fourteen billion, seven hundred twenty-one million, eight hundred sixty thousand, six hundred thirty-nine".