258905465 has 60 divisors (see below), whose sum is σ = 402109236. Its totient is φ = 159449472.

The previous prime is 258905443. The next prime is 258905467. The reversal of 258905465 is 564509852.

It can be written as a sum of positive squares in 10 ways, for example, as 252269689 + 6635776 = 15883^2 + 2576^2 .

It is not a de Polignac number, because 258905465 - 2⁶ = 258905401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (258905467) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 6997427 + ... + 6997463.

Almost surely, 2^258905465 is an apocalyptic number.

It is an amenable number.

258905465 is a deficient number, since it is larger than the sum of its proper divisors (143203771).

258905465 is an frugal number, since it uses more digits than its factorization.

258905465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108 (or 62 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 44.

The square root of 258905465 is about 16090.5396118340. The cubic root of 258905465 is about 637.3535452370.

The spelling of 258905465 in words is "two hundred fifty-eight million, nine hundred five thousand, four hundred sixty-five".