258773855 has 4 divisors (see below), whose sum is σ = 310528632. Its totient is φ = 207019080.

The previous prime is 258773849. The next prime is 258773857. The reversal of 258773855 is 558377852.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 258773855 - 2⁴ = 258773839 is a prime.

It is a super-2 number, since 2×258773855² = 133927816063122050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258773857) 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, 25877381 + ... + 25877390.

It is an arithmetic number, because the mean of its divisors is an integer number (77632158).

Almost surely, 2^258773855 is an apocalyptic number.

258773855 is a deficient number, since it is larger than the sum of its proper divisors (51754777).

258773855 is an equidigital number, since it uses as much as digits as its factorization.

258773855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51754776.

The product of its digits is 2352000, while the sum is 50.

The square root of 258773855 is about 16086.4494217960. The cubic root of 258773855 is about 637.2455311434.

The spelling of 258773855 in words is "two hundred fifty-eight million, seven hundred seventy-three thousand, eight hundred fifty-five".