14661221593 has 2 divisors, whose sum is σ = 14661221594. Its totient is φ = 14661221592.

The previous prime is 14661221581. The next prime is 14661221629. The reversal of 14661221593 is 39512216641.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14532784704 + 128436889 = 120552^2 + 11333^2 .

It is a cyclic number.

It is not a de Polignac number, because 14661221593 - 2¹³ = 14661213401 is a prime.

It is not a weakly prime, because it can be changed into another prime (14661221543) 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 as a sum of consecutive naturals, namely, 7330610796 + 7330610797.

It is an arithmetic number, because the mean of its divisors is an integer number (7330610797).

Almost surely, 2^14661221593 is an apocalyptic number.

It is an amenable number.

14661221593 is a deficient number, since it is larger than the sum of its proper divisors (1).

14661221593 is an equidigital number, since it uses as much as digits as its factorization.

14661221593 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 40.

The spelling of 14661221593 in words is "fourteen billion, six hundred sixty-one million, two hundred twenty-one thousand, five hundred ninety-three".