16554427434529 has 2 divisors, whose sum is σ = 16554427434530. Its totient is φ = 16554427434528.

The previous prime is 16554427434499. The next prime is 16554427434533. The reversal of 16554427434529 is 92543472445561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11280294718225 + 5274132716304 = 3358615^2 + 2296548^2 .

It is a cyclic number.

It is not a de Polignac number, because 16554427434529 - 2⁷ = 16554427434401 is a prime.

It is not a weakly prime, because it can be changed into another prime (16554427438529) 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, 8277213717264 + 8277213717265.

It is an arithmetic number, because the mean of its divisors is an integer number (8277213717265).

Almost surely, 2^{16554427434529} is an apocalyptic number.

It is an amenable number.

16554427434529 is a deficient number, since it is larger than the sum of its proper divisors (1).

16554427434529 is an equidigital number, since it uses as much as digits as its factorization.

16554427434529 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152000, while the sum is 61.

The spelling of 16554427434529 in words is "sixteen trillion, five hundred fifty-four billion, four hundred twenty-seven million, four hundred thirty-four thousand, five hundred twenty-nine".