265642624 has 64 divisors (see below), whose sum is σ = 573027840. Its totient is φ = 121936896.

The previous prime is 265642613. The next prime is 265642633. The reversal of 265642624 is 426246562.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 437329 + ... + 437935.

It is an arithmetic number, because the mean of its divisors is an integer number (8953560).

Almost surely, 2^265642624 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 265642624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (286513920).

265642624 is an abundant number, since it is smaller than the sum of its proper divisors (307385216).

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

265642624 is a wasteful number, since it uses less digits than its factorization.

265642624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 897 (or 885 counting only the distinct ones).

The product of its digits is 138240, while the sum is 37.

The square root of 265642624 is about 16298.5466836770. The cubic root of 265642624 is about 642.8346142181.

The spelling of 265642624 in words is "two hundred sixty-five million, six hundred forty-two thousand, six hundred twenty-four".