265878816 has 96 divisors (see below), whose sum is σ = 823431168. Its totient is φ = 73509120.

The previous prime is 265878803. The next prime is 265878829. The reversal of 265878816 is 618878562.

It is an interprime number because it is at equal distance from previous prime (265878803) and next prime (265878829).

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14451 + ... + 27213.

It is an arithmetic number, because the mean of its divisors is an integer number (8577408).

Almost surely, 2^265878816 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 265878816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (411715584).

265878816 is an abundant number, since it is smaller than the sum of its proper divisors (557552352).

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

265878816 is a wasteful number, since it uses less digits than its factorization.

265878816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12814 (or 12806 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 51.

The square root of 265878816 is about 16305.7908731837. The cubic root of 265878816 is about 643.0250799064.

The spelling of 265878816 in words is "two hundred sixty-five million, eight hundred seventy-eight thousand, eight hundred sixteen".