16774252535021 has 2 divisors, whose sum is σ = 16774252535022. Its totient is φ = 16774252535020.

The previous prime is 16774252535011. The next prime is 16774252535023. The reversal of 16774252535021 is 12053525247761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14742059732521 + 2032192802500 = 3839539^2 + 1425550^2 .

It is a cyclic number.

It is not a de Polignac number, because 16774252535021 - 2¹⁴ = 16774252518637 is a prime.

It is a Sophie Germain prime.

Together with 16774252535023, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16774252535023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8387126267510 + 8387126267511.

It is an arithmetic number, because the mean of its divisors is an integer number (8387126267511).

Almost surely, 2^{16774252535021} is an apocalyptic number.

It is an amenable number.

16774252535021 is a deficient number, since it is larger than the sum of its proper divisors (1).

16774252535021 is an equidigital number, since it uses as much as digits as its factorization.

16774252535021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528000, while the sum is 50.

The spelling of 16774252535021 in words is "sixteen trillion, seven hundred seventy-four billion, two hundred fifty-two million, five hundred thirty-five thousand, twenty-one".