265766513 has 4 divisors (see below), whose sum is σ = 265801380. Its totient is φ = 265731648.

The previous prime is 265766467. The next prime is 265766519. The reversal of 265766513 is 315667562.

265766513 = 11527² + 11528².

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 132871729 + 132894784 = 11527^2 + 11528^2 .

It is a cyclic number.

It is not a de Polignac number, because 265766513 - 2¹² = 265762417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (265766519) 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 in 3 ways as a sum of consecutive naturals, for example, 548 + ... + 23061.

It is an arithmetic number, because the mean of its divisors is an integer number (66450345).

Almost surely, 2^265766513 is an apocalyptic number.

265766513 is the 11528-th centered square number.

It is an amenable number.

265766513 is a deficient number, since it is larger than the sum of its proper divisors (34867).

265766513 is a wasteful number, since it uses less digits than its factorization.

265766513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34866.

The product of its digits is 226800, while the sum is 41.

The square root of 265766513 is about 16302.3468555911. The cubic root of 265766513 is about 642.9345326208.

The spelling of 265766513 in words is "two hundred sixty-five million, seven hundred sixty-six thousand, five hundred thirteen".