265516765 has 4 divisors (see below), whose sum is σ = 318620124. Its totient is φ = 212413408.

The previous prime is 265516763. The next prime is 265516777. The reversal of 265516765 is 567615562.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 120868036 + 144648729 = 10994^2 + 12027^2 .

It is a cyclic number.

It is not a de Polignac number, because 265516765 - 2¹ = 265516763 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265516763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26551672 + ... + 26551681.

It is an arithmetic number, because the mean of its divisors is an integer number (79655031).

Almost surely, 2^265516765 is an apocalyptic number.

It is an amenable number.

265516765 is a deficient number, since it is larger than the sum of its proper divisors (53103359).

265516765 is an equidigital number, since it uses as much as digits as its factorization.

265516765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53103358.

The product of its digits is 378000, while the sum is 43.

The square root of 265516765 is about 16294.6851764617. The cubic root of 265516765 is about 642.7330751636.

The spelling of 265516765 in words is "two hundred sixty-five million, five hundred sixteen thousand, seven hundred sixty-five".