14405563561 has 2 divisors, whose sum is σ = 14405563562. Its totient is φ = 14405563560.

The previous prime is 14405563541. The next prime is 14405563567. The reversal of 14405563561 is 16536550441.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13051691536 + 1353872025 = 114244^2 + 36795^2 .

It is a cyclic number.

It is not a de Polignac number, because 14405563561 - 2²¹ = 14403466409 is a prime.

It is a super-2 number, since 2×14405563561² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (14405563567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7202781780 + 7202781781.

It is an arithmetic number, because the mean of its divisors is an integer number (7202781781).

Almost surely, 2^14405563561 is an apocalyptic number.

It is an amenable number.

14405563561 is a deficient number, since it is larger than the sum of its proper divisors (1).

14405563561 is an equidigital number, since it uses as much as digits as its factorization.

14405563561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216000, while the sum is 40.

The spelling of 14405563561 in words is "fourteen billion, four hundred five million, five hundred sixty-three thousand, five hundred sixty-one".