16549494433 has 2 divisors, whose sum is σ = 16549494434. Its totient is φ = 16549494432.

The previous prime is 16549494427. The next prime is 16549494449. The reversal of 16549494433 is 33449494561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9559363984 + 6990130449 = 97772^2 + 83607^2 .

It is a cyclic number.

It is not a de Polignac number, because 16549494433 - 2²¹ = 16547397281 is a prime.

It is not a weakly prime, because it can be changed into another prime (16549494463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8274747216 + 8274747217.

It is an arithmetic number, because the mean of its divisors is an integer number (8274747217).

Almost surely, 2^16549494433 is an apocalyptic number.

It is an amenable number.

16549494433 is a deficient number, since it is larger than the sum of its proper divisors (1).

16549494433 is an equidigital number, since it uses as much as digits as its factorization.

16549494433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5598720, while the sum is 52.

The spelling of 16549494433 in words is "sixteen billion, five hundred forty-nine million, four hundred ninety-four thousand, four hundred thirty-three".