21632563045169 has 2 divisors, whose sum is σ = 21632563045170. Its totient is φ = 21632563045168.

The previous prime is 21632563045127. The next prime is 21632563045207. The reversal of 21632563045169 is 96154036523612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15675961466944 + 5956601578225 = 3959288^2 + 2440615^2 .

It is a cyclic number.

It is not a de Polignac number, because 21632563045169 - 2¹² = 21632563041073 is a prime.

It is a super-2 number, since 2×21632563045169² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21632563045169.

It is not a weakly prime, because it can be changed into another prime (21632563045669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10816281522584 + 10816281522585.

It is an arithmetic number, because the mean of its divisors is an integer number (10816281522585).

Almost surely, 2^{21632563045169} is an apocalyptic number.

It is an amenable number.

21632563045169 is a deficient number, since it is larger than the sum of its proper divisors (1).

21632563045169 is an equidigital number, since it uses as much as digits as its factorization.

21632563045169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6998400, while the sum is 53.

The spelling of 21632563045169 in words is "twenty-one trillion, six hundred thirty-two billion, five hundred sixty-three million, forty-five thousand, one hundred sixty-nine".