265395816 has 96 divisors (see below), whose sum is σ = 829171200. Its totient is φ = 75116160.

The previous prime is 265395797. The next prime is 265395817. The reversal of 265395816 is 618593562.

265395816 is a `hidden beast` number, since 2 + 65 + 3 + 9 + 581 + 6 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (265395817) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52521 + ... + 57351.

It is an arithmetic number, because the mean of its divisors is an integer number (8637200).

Almost surely, 2^265395816 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 265395816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (414585600).

265395816 is an abundant number, since it is smaller than the sum of its proper divisors (563775384).

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

265395816 is a wasteful number, since it uses less digits than its factorization.

265395816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4959 (or 4952 counting only the distinct ones).

The product of its digits is 388800, while the sum is 45.

The square root of 265395816 is about 16290.9734515774. The cubic root of 265395816 is about 642.6354671030.

The spelling of 265395816 in words is "two hundred sixty-five million, three hundred ninety-five thousand, eight hundred sixteen".