15564655730243 has 2 divisors, whose sum is σ = 15564655730244. Its totient is φ = 15564655730242.

The previous prime is 15564655730171. The next prime is 15564655730341. The reversal of 15564655730243 is 34203755646551.

It is a weak prime.

It is an emirp because it is prime and its reverse (34203755646551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15564655730243 - 2⁴⁰ = 14465144102467 is a prime.

It is not a weakly prime, because it can be changed into another prime (15564655730843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7782327865121 + 7782327865122.

It is an arithmetic number, because the mean of its divisors is an integer number (7782327865122).

Almost surely, 2^{15564655730243} is an apocalyptic number.

15564655730243 is a deficient number, since it is larger than the sum of its proper divisors (1).

15564655730243 is an equidigital number, since it uses as much as digits as its factorization.

15564655730243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360000, while the sum is 56.

The spelling of 15564655730243 in words is "fifteen trillion, five hundred sixty-four billion, six hundred fifty-five million, seven hundred thirty thousand, two hundred forty-three".