258491955 has 16 divisors (see below), whose sum is σ = 414109440. Its totient is φ = 137688288.

The previous prime is 258491939. The next prime is 258491969. The reversal of 258491955 is 559194852.

258491955 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 258491955 - 2⁴ = 258491939 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1876 + ... + 22814.

It is an arithmetic number, because the mean of its divisors is an integer number (25881840).

Almost surely, 2^258491955 is an apocalyptic number.

258491955 is a deficient number, since it is larger than the sum of its proper divisors (155617485).

258491955 is a wasteful number, since it uses less digits than its factorization.

258491955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21770.

The product of its digits is 648000, while the sum is 48.

The square root of 258491955 is about 16077.6850012681. The cubic root of 258491955 is about 637.0140487345.

The spelling of 258491955 in words is "two hundred fifty-eight million, four hundred ninety-one thousand, nine hundred fifty-five".