865266369 has 16 divisors (see below), whose sum is σ = 1259581440. Its totient is φ = 523982160.

The previous prime is 865266331. The next prime is 865266379. The reversal of 865266369 is 963662568.

865266369 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 865266369 - 2²⁴ = 848489153 is a prime.

It is a super-2 number, since 2×865266369² = 1497371778644888322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (865266379) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33912 + ... + 53670.

It is an arithmetic number, because the mean of its divisors is an integer number (78723840).

Almost surely, 2^865266369 is an apocalyptic number.

It is an amenable number.

865266369 is a deficient number, since it is larger than the sum of its proper divisors (394315071).

865266369 is a wasteful number, since it uses less digits than its factorization.

865266369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21100.

The product of its digits is 2799360, while the sum is 51.

The square root of 865266369 is about 29415.4103999927. The cubic root of 865266369 is about 952.9057363069.

The spelling of 865266369 in words is "eight hundred sixty-five million, two hundred sixty-six thousand, three hundred sixty-nine".