14545697921 has 4 divisors (see below), whose sum is σ = 14546041092. Its totient is φ = 14545354752.

The previous prime is 14545697909. The next prime is 14545697977. The reversal of 14545697921 is 12979654541.

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 9872608321 + 4673089600 = 99361^2 + 68360^2 .

It is a cyclic number.

It is not a de Polignac number, because 14545697921 - 2¹⁰ = 14545696897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14545657921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97280 + ... + 196353.

It is an arithmetic number, because the mean of its divisors is an integer number (3636510273).

Almost surely, 2^14545697921 is an apocalyptic number.

It is an amenable number.

14545697921 is a deficient number, since it is larger than the sum of its proper divisors (343171).

14545697921 is an equidigital number, since it uses as much as digits as its factorization.

14545697921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343170.

The product of its digits is 2721600, while the sum is 53.

The spelling of 14545697921 in words is "fourteen billion, five hundred forty-five million, six hundred ninety-seven thousand, nine hundred twenty-one".