14553453721 has 4 divisors (see below), whose sum is σ = 15409539252. Its totient is φ = 13697368192.

The previous prime is 14553453703. The next prime is 14553453743. The reversal of 14553453721 is 12735435541.

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 8907584400 + 5645869321 = 94380^2 + 75139^2 .

It is a cyclic number.

It is not a de Polignac number, because 14553453721 - 2²⁷ = 14419235993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14553453821) 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, 428042740 + ... + 428042773.

It is an arithmetic number, because the mean of its divisors is an integer number (3852384813).

Almost surely, 2^14553453721 is an apocalyptic number.

It is an amenable number.

14553453721 is a deficient number, since it is larger than the sum of its proper divisors (856085531).

14553453721 is an equidigital number, since it uses as much as digits as its factorization.

14553453721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856085530.

The product of its digits is 252000, while the sum is 40.

The spelling of 14553453721 in words is "fourteen billion, five hundred fifty-three million, four hundred fifty-three thousand, seven hundred twenty-one".