4644455549 has 2 divisors, whose sum is σ = 4644455550. Its totient is φ = 4644455548.

The previous prime is 4644455507. The next prime is 4644455587. The reversal of 4644455549 is 9455544464.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4188419524 + 456036025 = 64718^2 + 21355^2 .

It is a cyclic number.

It is not a de Polignac number, because 4644455549 - 2²⁰ = 4643406973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4644455497 and 4644455506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4644455749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2322227774 + 2322227775.

It is an arithmetic number, because the mean of its divisors is an integer number (2322227775).

Almost surely, 2^4644455549 is an apocalyptic number.

It is an amenable number.

4644455549 is a deficient number, since it is larger than the sum of its proper divisors (1).

4644455549 is an equidigital number, since it uses as much as digits as its factorization.

4644455549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912000, while the sum is 50.

The square root of 4644455549 is about 68150.2424720558. The cubic root of 4644455549 is about 1668.4438812226.

The spelling of 4644455549 in words is "four billion, six hundred forty-four million, four hundred fifty-five thousand, five hundred forty-nine".