265201645560461 has 4 divisors (see below), whose sum is σ = 265423943671932. Its totient is φ = 264979347448992.

The previous prime is 265201645560413. The next prime is 265201645560473. The reversal of 265201645560461 is 164065546102562.

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 49112204160100 + 216089441400361 = 7008010^2 + 14699981^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-265201645560461 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 (265201645560161) 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, 111149053946 + ... + 111149056331.

It is an arithmetic number, because the mean of its divisors is an integer number (66355985917983).

Almost surely, 2^{265201645560461} is an apocalyptic number.

It is an amenable number.

265201645560461 is a deficient number, since it is larger than the sum of its proper divisors (222298111471).

265201645560461 is a wasteful number, since it uses less digits than its factorization.

265201645560461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222298111470.

The product of its (nonzero) digits is 10368000, while the sum is 53.

The spelling of 265201645560461 in words is "two hundred sixty-five trillion, two hundred one billion, six hundred forty-five million, five hundred sixty thousand, four hundred sixty-one".