16433445249 has 81 divisors (see below), whose sum is σ = 27285329097. Its totient is φ = 9525252672.

The previous prime is 16433445229. The next prime is 16433445263. The reversal of 16433445249 is 94254433461.

The square root of 16433445249 is 128193.

It is a perfect power (a square), and thus also a powerful number.

16433445249 is a `hidden beast` number, since 1 + 64 + 3 + 344 + 5 + 249 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 131262849 + 16302182400 = 11457^2 + 127680^2 .

It is a de Polignac number, because none of the positive numbers 2^k-16433445249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16433445229) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 94990927 + ... + 94991099.

Almost surely, 2^16433445249 is an apocalyptic number.

16433445249 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

16433445249 is the 128193-rd square number.

16433445249 is the 64097-th centered octagonal number.

It is an amenable number.

16433445249 is a deficient number, since it is larger than the sum of its proper divisors (10851883848).

16433445249 is a wasteful number, since it uses less digits than its factorization.

16433445249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416 (or 208 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 45.

The spelling of 16433445249 in words is "sixteen billion, four hundred thirty-three million, four hundred forty-five thousand, two hundred forty-nine".