25688822842 has 16 divisors (see below), whose sum is σ = 40824029160. Its totient is φ = 12081707008.

The previous prime is 25688822821. The next prime is 25688822849. The reversal of 25688822842 is 24822888652.

It can be written as a sum of positive squares in 4 ways, for example, as 25670768841 + 18054001 = 160221^2 + 4249^2 .

It is not an unprimeable number, because it can be changed into a prime (25688822849) 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 7 ways as a sum of consecutive naturals, for example, 164917 + ... + 280312.

Almost surely, 2^25688822842 is an apocalyptic number.

25688822842 is a deficient number, since it is larger than the sum of its proper divisors (15135206318).

25688822842 is a wasteful number, since it uses less digits than its factorization.

25688822842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446945.

The product of its digits is 7864320, while the sum is 55.

The spelling of 25688822842 in words is "twenty-five billion, six hundred eighty-eight million, eight hundred twenty-two thousand, eight hundred forty-two".