265485163 has 4 divisors (see below), whose sum is σ = 265563720. Its totient is φ = 265406608.

The previous prime is 265485149. The next prime is 265485179. The reversal of 265485163 is 361584562.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 361584562 = 2 ⋅180792281.

It is a cyclic number.

It is not a de Polignac number, because 265485163 - 2²¹ = 263388011 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (265485193) 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, 33970 + ... + 41047.

It is an arithmetic number, because the mean of its divisors is an integer number (66390930).

Almost surely, 2^265485163 is an apocalyptic number.

265485163 is a deficient number, since it is larger than the sum of its proper divisors (78557).

265485163 is an equidigital number, since it uses as much as digits as its factorization.

265485163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78556.

The product of its digits is 172800, while the sum is 40.

The square root of 265485163 is about 16293.7154449192. The cubic root of 265485163 is about 642.7075746313.

The spelling of 265485163 in words is "two hundred sixty-five million, four hundred eighty-five thousand, one hundred sixty-three".