15543330161 has 2 divisors, whose sum is σ = 15543330162. Its totient is φ = 15543330160.

The previous prime is 15543330113. The next prime is 15543330167. The reversal of 15543330161 is 16103334551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11370170161 + 4173160000 = 106631^2 + 64600^2 .

It is a cyclic number.

It is not a de Polignac number, because 15543330161 - 2¹⁸ = 15543068017 is a prime.

It is a super-2 number, since 2×15543330161² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15543330167) 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, 7771665080 + 7771665081.

It is an arithmetic number, because the mean of its divisors is an integer number (7771665081).

Almost surely, 2^15543330161 is an apocalyptic number.

It is an amenable number.

15543330161 is a deficient number, since it is larger than the sum of its proper divisors (1).

15543330161 is an equidigital number, since it uses as much as digits as its factorization.

15543330161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16200, while the sum is 32.

The spelling of 15543330161 in words is "fifteen billion, five hundred forty-three million, three hundred thirty thousand, one hundred sixty-one".