258888065 has 4 divisors (see below), whose sum is σ = 310665684. Its totient is φ = 207110448.

The previous prime is 258888043. The next prime is 258888107. The reversal of 258888065 is 560888852.

258888065 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.

It can be written as a sum of positive squares in 2 ways, for example, as 174689089 + 84198976 = 13217^2 + 9176^2 .

It is a cyclic number.

It is not a de Polignac number, because 258888065 - 2⁸ = 258887809 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25888802 + ... + 25888811.

It is an arithmetic number, because the mean of its divisors is an integer number (77666421).

Almost surely, 2^258888065 is an apocalyptic number.

It is an amenable number.

258888065 is a deficient number, since it is larger than the sum of its proper divisors (51777619).

258888065 is an equidigital number, since it uses as much as digits as its factorization.

258888065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51777618.

The product of its (nonzero) digits is 1228800, while the sum is 50.

The square root of 258888065 is about 16089.9989123679. The cubic root of 258888065 is about 637.3392669236.

The spelling of 258888065 in words is "two hundred fifty-eight million, eight hundred eighty-eight thousand, sixty-five".