265165128 has 48 divisors (see below), whose sum is σ = 720259020. Its totient is φ = 88129536.

The previous prime is 265165073. The next prime is 265165129. The reversal of 265165128 is 821561562.

265165128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 264973284 + 191844 = 16278^2 + 438^2 .

It is a super-3 number, since 3×265165128³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 265165092 and 265165101.

It is not an unprimeable number, because it can be changed into a prime (265165129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20200 + ... + 30632.

Almost surely, 2^265165128 is an apocalyptic number.

It is an amenable number.

265165128 is an abundant number, since it is smaller than the sum of its proper divisors (455093892).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

265165128 is a wasteful number, since it uses less digits than its factorization.

265165128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10798 (or 10791 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 265165128 is about 16283.8916724473. The cubic root of 265165128 is about 642.4492154039.

The spelling of 265165128 in words is "two hundred sixty-five million, one hundred sixty-five thousand, one hundred twenty-eight".