16645764269 has 2 divisors, whose sum is σ = 16645764270. Its totient is φ = 16645764268.

The previous prime is 16645764167. The next prime is 16645764287. The reversal of 16645764269 is 96246754661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12519372100 + 4126392169 = 111890^2 + 64237^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16645764269 is a prime.

It is a super-2 number, since 2×16645764269² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16645763269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8322882134 + 8322882135.

It is an arithmetic number, because the mean of its divisors is an integer number (8322882135).

Almost surely, 2^16645764269 is an apocalyptic number.

It is an amenable number.

16645764269 is a deficient number, since it is larger than the sum of its proper divisors (1).

16645764269 is an equidigital number, since it uses as much as digits as its factorization.

16645764269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13063680, while the sum is 56.

The spelling of 16645764269 in words is "sixteen billion, six hundred forty-five million, seven hundred sixty-four thousand, two hundred sixty-nine".