243136625256 has 72 divisors (see below), whose sum is σ = 766004429970. Its totient is φ = 69467606208.

The previous prime is 243136625243. The next prime is 243136625299. The reversal of 243136625256 is 652526631342.

243136625256 is a `hidden beast` number, since 2 + 4 + 3 + 13 + 6 + 625 + 2 + 5 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 166831402500 + 76305222756 = 408450^2 + 276234^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 34454611 + ... + 34461666.

Almost surely, 2^243136625256 is an apocalyptic number.

It is an amenable number.

243136625256 is an abundant number, since it is smaller than the sum of its proper divisors (522867804714).

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

243136625256 is a wasteful number, since it uses less digits than its factorization.

243136625256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68916303 (or 68916289 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 45.

The spelling of 243136625256 in words is "two hundred forty-three billion, one hundred thirty-six million, six hundred twenty-five thousand, two hundred fifty-six".