16733233449 has 27 divisors (see below), whose sum is σ = 25114300887. Its totient is φ = 11148503688.

The previous prime is 16733233423. The next prime is 16733233469. The reversal of 16733233449 is 94433233761.

It is a happy number.

The square root of 16733233449 is 129357.

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

It can be written as a sum of positive squares in only one way, i.e., 3354147225 + 13379086224 = 57915^2 + 115668^2 .

It is a tau number, because it is divible by the number of its divisors (27).

It is not a de Polignac number, because 16733233449 - 2¹¹ = 16733231401 is a prime.

It is a super-2 number, since 2×16733233449² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16733233469) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 10477119 + ... + 10478715.

Almost surely, 2^16733233449 is an apocalyptic number.

16733233449 is the 129357-th square number.

16733233449 is the 64679-th centered octagonal number.

It is an amenable number.

16733233449 is a deficient number, since it is larger than the sum of its proper divisors (8381067438).

16733233449 is an frugal number, since it uses more digits than its factorization.

16733233449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3218 (or 1600 counting only the distinct ones).

The product of its digits is 979776, while the sum is 45.

The spelling of 16733233449 in words is "sixteen billion, seven hundred thirty-three million, two hundred thirty-three thousand, four hundred forty-nine".