265201313564545 has 4 divisors (see below), whose sum is σ = 318241576277460. Its totient is φ = 212161050851632.

The previous prime is 265201313564533. The next prime is 265201313564549. The reversal of 265201313564545 is 545465313102562.

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 176866353390321 + 88334960174224 = 13299111^2 + 9398668^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-265201313564545 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 265201313564492 and 265201313564501.

It is not an unprimeable number, because it can be changed into a prime (265201313564549) 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, 26520131356450 + ... + 26520131356459.

It is an arithmetic number, because the mean of its divisors is an integer number (79560394069365).

Almost surely, 2^{265201313564545} is an apocalyptic number.

It is an amenable number.

265201313564545 is a deficient number, since it is larger than the sum of its proper divisors (53040262712915).

265201313564545 is an equidigital number, since it uses as much as digits as its factorization.

265201313564545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53040262712914.

The product of its (nonzero) digits is 12960000, while the sum is 52.

The spelling of 265201313564545 in words is "two hundred sixty-five trillion, two hundred one billion, three hundred thirteen million, five hundred sixty-four thousand, five hundred forty-five".