258275649 has 4 divisors (see below), whose sum is σ = 344367536. Its totient is φ = 172183764.

The previous prime is 258275639. The next prime is 258275681. The reversal of 258275649 is 946572852.

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 258275649 - 2²¹ = 256178497 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 258275598 and 258275607.

It is not an unprimeable number, because it can be changed into a prime (258275629) 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, 43045939 + ... + 43045944.

It is an arithmetic number, because the mean of its divisors is an integer number (86091884).

Almost surely, 2^258275649 is an apocalyptic number.

It is an amenable number.

258275649 is a deficient number, since it is larger than the sum of its proper divisors (86091887).

258275649 is an equidigital number, since it uses as much as digits as its factorization.

258275649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86091886.

The product of its digits is 1209600, while the sum is 48.

The square root of 258275649 is about 16070.9566921201. The cubic root of 258275649 is about 636.8363147532.

The spelling of 258275649 in words is "two hundred fifty-eight million, two hundred seventy-five thousand, six hundred forty-nine".