16554427434499 has 2 divisors, whose sum is σ = 16554427434500. Its totient is φ = 16554427434498.

The previous prime is 16554427434463. The next prime is 16554427434529. The reversal of 16554427434499 is 99443472445561.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16554427434499 - 2⁷ = 16554427434371 is a prime.

It is not a weakly prime, because it can be changed into another prime (16554427434199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8277213717249 + 8277213717250.

It is an arithmetic number, because the mean of its divisors is an integer number (8277213717250).

Almost surely, 2^{16554427434499} is an apocalyptic number.

16554427434499 is a deficient number, since it is larger than the sum of its proper divisors (1).

16554427434499 is an equidigital number, since it uses as much as digits as its factorization.

16554427434499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 522547200, while the sum is 67.

The spelling of 16554427434499 in words is "sixteen trillion, five hundred fifty-four billion, four hundred twenty-seven million, four hundred thirty-four thousand, four hundred ninety-nine".