258667856836 has 27 divisors (see below), whose sum is σ = 457055682951. Its totient is φ = 128092450464.

The previous prime is 258667856807. The next prime is 258667856891. The reversal of 258667856836 is 638658766852.

The square root of 258667856836 is 508594.

It is a perfect power (a square), and thus also a powerful number.

258667856836 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 457532100 + 258210324736 = 21390^2 + 508144^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 110872326 + ... + 110874658.

Almost surely, 2^258667856836 is an apocalyptic number.

258667856836 is the 508594-th square number.

It is an amenable number.

258667856836 is a deficient number, since it is larger than the sum of its proper divisors (198387826115).

258667856836 is an frugal number, since it uses more digits than its factorization.

258667856836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4888 (or 2444 counting only the distinct ones).

The product of its digits is 696729600, while the sum is 70.

The spelling of 258667856836 in words is "two hundred fifty-eight billion, six hundred sixty-seven million, eight hundred fifty-six thousand, eight hundred thirty-six".