265447649 has 2 divisors, whose sum is σ = 265447650. Its totient is φ = 265447648.

The previous prime is 265447621. The next prime is 265447711. The reversal of 265447649 is 946744562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 257923600 + 7524049 = 16060^2 + 2743^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-265447649 is a prime.

It is not a weakly prime, because it can be changed into another prime (265447849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132723824 + 132723825.

It is an arithmetic number, because the mean of its divisors is an integer number (132723825).

Almost surely, 2^265447649 is an apocalyptic number.

It is an amenable number.

265447649 is a deficient number, since it is larger than the sum of its proper divisors (1).

265447649 is an equidigital number, since it uses as much as digits as its factorization.

265447649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1451520, while the sum is 47.

The square root of 265447649 is about 16292.5642242098. The cubic root of 265447649 is about 642.6773009148.

The spelling of 265447649 in words is "two hundred sixty-five million, four hundred forty-seven thousand, six hundred forty-nine".