16556242105019 has 2 divisors, whose sum is σ = 16556242105020. Its totient is φ = 16556242105018.

The previous prime is 16556242104971. The next prime is 16556242105027. The reversal of 16556242105019 is 91050124265561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16556242105019 - 2¹⁶ = 16556242039483 is a prime.

It is a super-2 number, since 2×16556242105019² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16556242105079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8278121052509 + 8278121052510.

It is an arithmetic number, because the mean of its divisors is an integer number (8278121052510).

Almost surely, 2^{16556242105019} is an apocalyptic number.

16556242105019 is a deficient number, since it is larger than the sum of its proper divisors (1).

16556242105019 is an equidigital number, since it uses as much as digits as its factorization.

16556242105019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648000, while the sum is 47.

The spelling of 16556242105019 in words is "sixteen trillion, five hundred fifty-six billion, two hundred forty-two million, one hundred five thousand, nineteen".