2731664549 has 2 divisors, whose sum is σ = 2731664550. Its totient is φ = 2731664548.

The previous prime is 2731664501. The next prime is 2731664563. The reversal of 2731664549 is 9454661372.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2362640449 + 369024100 = 48607^2 + 19210^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2731664549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2731664249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1365832274 + 1365832275.

It is an arithmetic number, because the mean of its divisors is an integer number (1365832275).

Almost surely, 2^2731664549 is an apocalyptic number.

It is an amenable number.

2731664549 is a deficient number, since it is larger than the sum of its proper divisors (1).

2731664549 is an equidigital number, since it uses as much as digits as its factorization.

2731664549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 47.

The square root of 2731664549 is about 52265.3283640312. The cubic root of 2731664549 is about 1397.8989827083.

The spelling of 2731664549 in words is "two billion, seven hundred thirty-one million, six hundred sixty-four thousand, five hundred forty-nine".