258685065 has 12 divisors (see below), whose sum is σ = 448387524. Its totient is φ = 137965344.

The previous prime is 258685043. The next prime is 258685067. The reversal of 258685065 is 560586852.

258685065 is a `hidden beast` number, since 2 + 586 + 8 + 5 + 0 + 65 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 47941776 + 210743289 = 6924^2 + 14517^2 .

It is not a de Polignac number, because 258685065 - 2¹¹ = 258683017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 5748557 = 258685065 / (2 + 5 + 8 + 6 + 8 + 5 + 0 + 6 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 258685065.

It is not an unprimeable number, because it can be changed into a prime (258685067) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2874234 + ... + 2874323.

It is an arithmetic number, because the mean of its divisors is an integer number (37365627).

Almost surely, 2^258685065 is an apocalyptic number.

It is an amenable number.

258685065 is a deficient number, since it is larger than the sum of its proper divisors (189702459).

258685065 is a wasteful number, since it uses less digits than its factorization.

258685065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5748568 (or 5748565 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 45.

The square root of 258685065 is about 16083.6894088390. The cubic root of 258685065 is about 637.1726393086.

The spelling of 258685065 in words is "two hundred fifty-eight million, six hundred eighty-five thousand, sixty-five".