258343855868 has 24 divisors (see below), whose sum is σ = 547081107552. Its totient is φ = 104205924864.

The previous prime is 258343855837. The next prime is 258343855873. The reversal of 258343855868 is 868558343852.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 271369121 + ... + 271370072.

It is an arithmetic number, because the mean of its divisors is an integer number (22795046148).

Almost surely, 2^258343855868 is an apocalyptic number.

258343855868 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

258343855868 is an abundant number, since it is smaller than the sum of its proper divisors (288737251684).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

258343855868 is a wasteful number, since it uses less digits than its factorization.

258343855868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542739221 (or 542739219 counting only the distinct ones).

The product of its digits is 221184000, while the sum is 65.

The spelling of 258343855868 in words is "two hundred fifty-eight billion, three hundred forty-three million, eight hundred fifty-five thousand, eight hundred sixty-eight".