25687233438 has 8 divisors (see below), whose sum is σ = 51374466888. Its totient is φ = 8562411144.

The previous prime is 25687233433. The next prime is 25687233463. The reversal of 25687233438 is 83433278652.

It is a sphenic number, since it is the product of 3 distinct primes.

25687233438 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25687233433) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2140602781 + ... + 2140602792.

It is an arithmetic number, because the mean of its divisors is an integer number (6421808361).

Almost surely, 2^25687233438 is an apocalyptic number.

25687233438 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

25687233438 is a wasteful number, since it uses less digits than its factorization.

25687233438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4281205578.

The product of its digits is 5806080, while the sum is 51.

The spelling of 25687233438 in words is "twenty-five billion, six hundred eighty-seven million, two hundred thirty-three thousand, four hundred thirty-eight".