265330639 has 12 divisors (see below), whose sum is σ = 316180368. Its totient is φ = 221877600.

The previous prime is 265330633. The next prime is 265330661. The reversal of 265330639 is 936033562.

It is not a de Polignac number, because 265330639 - 2³ = 265330631 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 265330598 and 265330607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265330631) 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 11 ways as a sum of consecutive naturals, for example, 64027 + ... + 68044.

It is an arithmetic number, because the mean of its divisors is an integer number (26348364).

Almost surely, 2^265330639 is an apocalyptic number.

265330639 is a deficient number, since it is larger than the sum of its proper divisors (50849729).

265330639 is a wasteful number, since it uses less digits than its factorization.

265330639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132126 (or 132119 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 37.

The square root of 265330639 is about 16288.9729264923. The cubic root of 265330639 is about 642.5828557723.

The spelling of 265330639 in words is "two hundred sixty-five million, three hundred thirty thousand, six hundred thirty-nine".