14550218561 has 4 divisors (see below), whose sum is σ = 14552024532. Its totient is φ = 14548412592.

The previous prime is 14550218549. The next prime is 14550218567. The reversal of 14550218561 is 16581205541.

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 10275674161 + 4274544400 = 101369^2 + 65380^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14550218561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14550218567) 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, 890846 + ... + 907031.

It is an arithmetic number, because the mean of its divisors is an integer number (3638006133).

Almost surely, 2^14550218561 is an apocalyptic number.

It is an amenable number.

14550218561 is a deficient number, since it is larger than the sum of its proper divisors (1805971).

14550218561 is an equidigital number, since it uses as much as digits as its factorization.

14550218561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1805970.

The product of its (nonzero) digits is 48000, while the sum is 38.

The spelling of 14550218561 in words is "fourteen billion, five hundred fifty million, two hundred eighteen thousand, five hundred sixty-one".