25654242544 has 80 divisors (see below), whose sum is σ = 57310220800. Its totient is φ = 10897327872.

The previous prime is 25654242539. The next prime is 25654242563. The reversal of 25654242544 is 44524245652.

It is a self number, because there is not a number n which added to its sum of digits gives 25654242544.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 13652197 + ... + 13654075.

It is an arithmetic number, because the mean of its divisors is an integer number (716377760).

Almost surely, 2^25654242544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25654242544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28655110400).

25654242544 is an abundant number, since it is smaller than the sum of its proper divisors (31655978256).

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

25654242544 is a wasteful number, since it uses less digits than its factorization.

25654242544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2910 (or 2904 counting only the distinct ones).

The product of its digits is 1536000, while the sum is 43.

The spelling of 25654242544 in words is "twenty-five billion, six hundred fifty-four million, two hundred forty-two thousand, five hundred forty-four".