6544078949 has 2 divisors, whose sum is σ = 6544078950. Its totient is φ = 6544078948.

The previous prime is 6544078943. The next prime is 6544078967. The reversal of 6544078949 is 9498704456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6366922849 + 177156100 = 79793^2 + 13310^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6544078949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6544078894 and 6544078903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6544078943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3272039474 + 3272039475.

It is an arithmetic number, because the mean of its divisors is an integer number (3272039475).

Almost surely, 2^6544078949 is an apocalyptic number.

It is an amenable number.

6544078949 is a deficient number, since it is larger than the sum of its proper divisors (1).

6544078949 is an equidigital number, since it uses as much as digits as its factorization.

6544078949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8709120, while the sum is 56.

The square root of 6544078949 is about 80895.4816352557. The cubic root of 6544078949 is about 1870.4646722894.

The spelling of 6544078949 in words is "six billion, five hundred forty-four million, seventy-eight thousand, nine hundred forty-nine".