5531644549 has 2 divisors, whose sum is σ = 5531644550. Its totient is φ = 5531644548.

The previous prime is 5531644513. The next prime is 5531644589. The reversal of 5531644549 is 9454461355.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4572193924 + 959450625 = 67618^2 + 30975^2 .

It is a cyclic number.

It is not a de Polignac number, because 5531644549 - 2¹⁵ = 5531611781 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 5531644499 and 5531644508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5531644589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2765822274 + 2765822275.

It is an arithmetic number, because the mean of its divisors is an integer number (2765822275).

Almost surely, 2^5531644549 is an apocalyptic number.

It is an amenable number.

5531644549 is a deficient number, since it is larger than the sum of its proper divisors (1).

5531644549 is an equidigital number, since it uses as much as digits as its factorization.

5531644549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296000, while the sum is 46.

The square root of 5531644549 is about 74375.0263798273. The cubic root of 5531644549 is about 1768.5530375990.

The spelling of 5531644549 in words is "five billion, five hundred thirty-one million, six hundred forty-four thousand, five hundred forty-nine".