265438857 has 4 divisors (see below), whose sum is σ = 353918480. Its totient is φ = 176959236.

The previous prime is 265438843. The next prime is 265438891. The reversal of 265438857 is 758834562.

265438857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 265438857 - 2⁴ = 265438841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (265438057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44239807 + ... + 44239812.

It is an arithmetic number, because the mean of its divisors is an integer number (88479620).

Almost surely, 2^265438857 is an apocalyptic number.

It is an amenable number.

265438857 is a deficient number, since it is larger than the sum of its proper divisors (88479623).

265438857 is an equidigital number, since it uses as much as digits as its factorization.

265438857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88479622.

The product of its digits is 1612800, while the sum is 48.

The square root of 265438857 is about 16292.2944056385. The cubic root of 265438857 is about 642.6702053773.

The spelling of 265438857 in words is "two hundred sixty-five million, four hundred thirty-eight thousand, eight hundred fifty-seven".