265011655 has 4 divisors (see below), whose sum is σ = 318013992. Its totient is φ = 212009320.

The previous prime is 265011641. The next prime is 265011661. The reversal of 265011655 is 556110562.

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

It is not a de Polignac number, because 265011655 - 2⁹ = 265011143 is a prime.

It is a Duffinian number.

265011655 is a modest number, since divided by 11655 gives 265 as remainder.

It is a congruent number.

It is an unprimeable number.

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, 26501161 + ... + 26501170.

It is an arithmetic number, because the mean of its divisors is an integer number (79503498).

Almost surely, 2^265011655 is an apocalyptic number.

265011655 is a deficient number, since it is larger than the sum of its proper divisors (53002337).

265011655 is an equidigital number, since it uses as much as digits as its factorization.

265011655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53002336.

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 265011655 is about 16279.1785726430. The cubic root of 265011655 is about 642.3252453106.

The spelling of 265011655 in words is "two hundred sixty-five million, eleven thousand, six hundred fifty-five".