265548649 has 2 divisors, whose sum is σ = 265548650. Its totient is φ = 265548648.

The previous prime is 265548643. The next prime is 265548719. The reversal of 265548649 is 946845562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 245235600 + 20313049 = 15660^2 + 4507^2 .

It is a cyclic number.

It is not a de Polignac number, because 265548649 - 2⁹ = 265548137 is a prime.

It is not a weakly prime, because it can be changed into another prime (265548643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132774324 + 132774325.

It is an arithmetic number, because the mean of its divisors is an integer number (132774325).

Almost surely, 2^265548649 is an apocalyptic number.

It is an amenable number.

265548649 is a deficient number, since it is larger than the sum of its proper divisors (1).

265548649 is an equidigital number, since it uses as much as digits as its factorization.

265548649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2073600, while the sum is 49.

The square root of 265548649 is about 16295.6635029078. The cubic root of 265548649 is about 642.7588011991.

The spelling of 265548649 in words is "two hundred sixty-five million, five hundred forty-eight thousand, six hundred forty-nine".