25502439428 has 6 divisors (see below), whose sum is σ = 44629269006. Its totient is φ = 12751219712.

The previous prime is 25502439421. The next prime is 25502439433. The reversal of 25502439428 is 82493420552.

It can be written as a sum of positive squares in only one way, i.e., 15697082944 + 9805356484 = 125288^2 + 99022^2 .

It is not an unprimeable number, because it can be changed into a prime (25502439421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3187804925 + ... + 3187804932.

It is an arithmetic number, because the mean of its divisors is an integer number (7438211501).

Almost surely, 2^25502439428 is an apocalyptic number.

It is an amenable number.

25502439428 is a deficient number, since it is larger than the sum of its proper divisors (19126829578).

25502439428 is a wasteful number, since it uses less digits than its factorization.

25502439428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6375609861 (or 6375609859 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 44.

The spelling of 25502439428 in words is "twenty-five billion, five hundred two million, four hundred thirty-nine thousand, four hundred twenty-eight".