25041440538 has 24 divisors (see below), whose sum is σ = 57448011348. Its totient is φ = 7856138112.

The previous prime is 25041440449. The next prime is 25041440539. The reversal of 25041440538 is 83504414052.

It is a happy number.

25041440538 is a `hidden beast` number, since 2 + 504 + 144 + 0 + 5 + 3 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 22186996209 + 2854444329 = 148953^2 + 53427^2 .

It is not an unprimeable number, because it can be changed into a prime (25041440539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40917081 + ... + 40917692.

Almost surely, 2^25041440538 is an apocalyptic number.

25041440538 is an abundant number, since it is smaller than the sum of its proper divisors (32406570810).

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

25041440538 is a wasteful number, since it uses less digits than its factorization.

25041440538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81834798 (or 81834795 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

The spelling of 25041440538 in words is "twenty-five billion, forty-one million, four hundred forty thousand, five hundred thirty-eight".