265673795909 has 2 divisors, whose sum is σ = 265673795910. Its totient is φ = 265673795908.

The previous prime is 265673795903. The next prime is 265673795939. The reversal of 265673795909 is 909597376562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 156145893409 + 109527902500 = 395153^2 + 330950^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-265673795909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (265673795903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132836897954 + 132836897955.

It is an arithmetic number, because the mean of its divisors is an integer number (132836897955).

Almost surely, 2^265673795909 is an apocalyptic number.

It is an amenable number.

265673795909 is a deficient number, since it is larger than the sum of its proper divisors (1).

265673795909 is an equidigital number, since it uses as much as digits as its factorization.

265673795909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192893400, while the sum is 68.

The spelling of 265673795909 in words is "two hundred sixty-five billion, six hundred seventy-three million, seven hundred ninety-five thousand, nine hundred nine".