265223322561 has 8 divisors (see below), whose sum is σ = 369006361920. Its totient is φ = 169127915792.

The previous prime is 265223322517. The next prime is 265223322569. The reversal of 265223322561 is 165223322562.

265223322561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 265223322561 - 2⁷ = 265223322433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (265223322569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1921908066 + ... + 1921908203.

It is an arithmetic number, because the mean of its divisors is an integer number (46125795240).

Almost surely, 2^265223322561 is an apocalyptic number.

It is an amenable number.

265223322561 is a deficient number, since it is larger than the sum of its proper divisors (103783039359).

265223322561 is a wasteful number, since it uses less digits than its factorization.

265223322561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3843816295.

The product of its digits is 259200, while the sum is 39.

Subtracting from 265223322561 its reverse (165223322562), we obtain a palindrome (99999999999).

The spelling of 265223322561 in words is "two hundred sixty-five billion, two hundred twenty-three million, three hundred twenty-two thousand, five hundred sixty-one".