14681007521 has 4 divisors (see below), whose sum is σ = 14832358212. Its totient is φ = 14529656832.

The previous prime is 14681007511. The next prime is 14681007563. The reversal of 14681007521 is 12570018641.

14681007521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3966480400 + 10714527121 = 62980^2 + 103511^2 .

It is a cyclic number.

It is not a de Polignac number, because 14681007521 - 2¹⁴ = 14680991137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (14681007511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75675200 + ... + 75675393.

It is an arithmetic number, because the mean of its divisors is an integer number (3708089553).

Almost surely, 2^14681007521 is an apocalyptic number.

It is an amenable number.

14681007521 is a deficient number, since it is larger than the sum of its proper divisors (151350691).

14681007521 is an equidigital number, since it uses as much as digits as its factorization.

14681007521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151350690.

The product of its (nonzero) digits is 13440, while the sum is 35.

The spelling of 14681007521 in words is "fourteen billion, six hundred eighty-one million, seven thousand, five hundred twenty-one".