25140044240 has 20 divisors (see below), whose sum is σ = 58450603044. Its totient is φ = 10056017664.

The previous prime is 25140044231. The next prime is 25140044243. The reversal of 25140044240 is 4244004152.

It can be written as a sum of positive squares in 2 ways, for example, as 18519943744 + 6620100496 = 136088^2 + 81364^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25140044243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157125197 + ... + 157125356.

Almost surely, 2^25140044240 is an apocalyptic number.

25140044240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25140044240 is an abundant number, since it is smaller than the sum of its proper divisors (33310558804).

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

25140044240 is a wasteful number, since it uses less digits than its factorization.

25140044240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314250566 (or 314250560 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 26.

Adding to 25140044240 its reverse (4244004152), we get a palindrome (29384048392).

The spelling of 25140044240 in words is "twenty-five billion, one hundred forty million, forty-four thousand, two hundred forty".