16441649261 has 2 divisors, whose sum is σ = 16441649262. Its totient is φ = 16441649260.

The previous prime is 16441649249. The next prime is 16441649293. The reversal of 16441649261 is 16294614461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9023100100 + 7418549161 = 94990^2 + 86131^2 .

It is a cyclic number.

It is not a de Polignac number, because 16441649261 - 2³⁰ = 15367907437 is a prime.

It is a super-3 number, since 3×16441649261³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16441649201) 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, 8220824630 + 8220824631.

It is an arithmetic number, because the mean of its divisors is an integer number (8220824631).

Almost surely, 2^16441649261 is an apocalyptic number.

It is an amenable number.

16441649261 is a deficient number, since it is larger than the sum of its proper divisors (1).

16441649261 is an equidigital number, since it uses as much as digits as its factorization.

16441649261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 44.

The spelling of 16441649261 in words is "sixteen billion, four hundred forty-one million, six hundred forty-nine thousand, two hundred sixty-one".