25243113244240 has 20 divisors (see below), whose sum is σ = 58690238293044. Its totient is φ = 10097245297664.

The previous prime is 25243113244231. The next prime is 25243113244241. The reversal of 25243113244240 is 4244231134252.

It can be written as a sum of positive squares in 2 ways, for example, as 19786198556224 + 5456914688016 = 4448168^2 + 2336004^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 25243113244240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25243113244241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157769457697 + ... + 157769457856.

Almost surely, 2^{25243113244240} is an apocalyptic number.

25243113244240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25243113244240 is an abundant number, since it is smaller than the sum of its proper divisors (33447125048804).

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

25243113244240 is a wasteful number, since it uses less digits than its factorization.

25243113244240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315538915566 (or 315538915560 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 37.

Adding to 25243113244240 its reverse (4244231134252), we get a palindrome (29487344378492).

The spelling of 25243113244240 in words is "twenty-five trillion, two hundred forty-three billion, one hundred thirteen million, two hundred forty-four thousand, two hundred forty".