6615200549 has 2 divisors, whose sum is σ = 6615200550. Its totient is φ = 6615200548.

The previous prime is 6615200491. The next prime is 6615200587. The reversal of 6615200549 is 9450025166.

It is an a-pointer prime, because the next prime (6615200587) can be obtained adding 6615200549 to its sum of digits (38).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6485080900 + 130119649 = 80530^2 + 11407^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6615200549 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6615230549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3307600274 + 3307600275.

It is an arithmetic number, because the mean of its divisors is an integer number (3307600275).

Almost surely, 2^6615200549 is an apocalyptic number.

It is an amenable number.

6615200549 is a deficient number, since it is larger than the sum of its proper divisors (1).

6615200549 is an equidigital number, since it uses as much as digits as its factorization.

6615200549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 6615200549 is about 81333.8831545623. The cubic root of 6615200549 is about 1877.2163940360.

The spelling of 6615200549 in words is "six billion, six hundred fifteen million, two hundred thousand, five hundred forty-nine".