16356423663533 has 2 divisors, whose sum is σ = 16356423663534. Its totient is φ = 16356423663532.

The previous prime is 16356423663473. The next prime is 16356423663647. The reversal of 16356423663533 is 33536632465361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15941277978409 + 415145685124 = 3992653^2 + 644318^2 .

It is a cyclic number.

It is not a de Polignac number, because 16356423663533 - 2¹² = 16356423659437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16356423662533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8178211831766 + 8178211831767.

It is an arithmetic number, because the mean of its divisors is an integer number (8178211831767).

Almost surely, 2^{16356423663533} is an apocalyptic number.

It is an amenable number.

16356423663533 is a deficient number, since it is larger than the sum of its proper divisors (1).

16356423663533 is an equidigital number, since it uses as much as digits as its factorization.

16356423663533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62985600, while the sum is 56.

The spelling of 16356423663533 in words is "sixteen trillion, three hundred fifty-six billion, four hundred twenty-three million, six hundred sixty-three thousand, five hundred thirty-three".