14159615721 has 32 divisors (see below), whose sum is σ = 19549071360. Its totient is φ = 9110428800.

The previous prime is 14159615711. The next prime is 14159615749. The reversal of 14159615721 is 12751695141.

It is not a de Polignac number, because 14159615721 - 2⁷ = 14159615593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (14159615711) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5315836 + ... + 5318498.

It is an arithmetic number, because the mean of its divisors is an integer number (610908480).

Almost surely, 2^14159615721 is an apocalyptic number.

It is an amenable number.

14159615721 is a deficient number, since it is larger than the sum of its proper divisors (5389455639).

14159615721 is a wasteful number, since it uses less digits than its factorization.

14159615721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3157.

The product of its digits is 75600, while the sum is 42.

The spelling of 14159615721 in words is "fourteen billion, one hundred fifty-nine million, six hundred fifteen thousand, seven hundred twenty-one".