25040434140 has 144 divisors (see below), whose sum is σ = 78842539776. Its totient is φ = 6426086400.

The previous prime is 25040434117. The next prime is 25040434187. The reversal of 25040434140 is 4143404052.

It is a happy number.

25040434140 is a `hidden beast` number, since 2 + 50 + 40 + 434 + 140 = 666.

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 47 ways as a sum of consecutive naturals, for example, 997584 + ... + 1022376.

Almost surely, 2^25040434140 is an apocalyptic number.

25040434140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25040434140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39421269888).

25040434140 is an abundant number, since it is smaller than the sum of its proper divisors (53802105636).

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

25040434140 is a wasteful number, since it uses less digits than its factorization.

25040434140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25020 (or 25015 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

Adding to 25040434140 its reverse (4143404052), we get a palindrome (29183838192).

The spelling of 25040434140 in words is "twenty-five billion, forty million, four hundred thirty-four thousand, one hundred forty".