16643145263 has 2 divisors, whose sum is σ = 16643145264. Its totient is φ = 16643145262.

The previous prime is 16643145257. The next prime is 16643145329. The reversal of 16643145263 is 36254134661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16643145263 - 2⁸ = 16643145007 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16643145263.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16643144263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8321572631 + 8321572632.

It is an arithmetic number, because the mean of its divisors is an integer number (8321572632).

Almost surely, 2^16643145263 is an apocalyptic number.

16643145263 is a deficient number, since it is larger than the sum of its proper divisors (1).

16643145263 is an equidigital number, since it uses as much as digits as its factorization.

16643145263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 41.

The spelling of 16643145263 in words is "sixteen billion, six hundred forty-three million, one hundred forty-five thousand, two hundred sixty-three".