25005440502 has 80 divisors (see below), whose sum is σ = 64121888160. Its totient is φ = 7134728832.

The previous prime is 25005440489. The next prime is 25005440527. The reversal of 25005440502 is 20504450052.

25005440502 is a `hidden beast` number, since 250 + 0 + 5 + 4 + 405 + 0 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 843874 + ... + 873002.

It is an arithmetic number, because the mean of its divisors is an integer number (801523602).

Almost surely, 2^25005440502 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25005440502, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32060944080).

25005440502 is an abundant number, since it is smaller than the sum of its proper divisors (39116447658).

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

25005440502 is a wasteful number, since it uses less digits than its factorization.

25005440502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29907 (or 29898 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 27.

Adding to 25005440502 its reverse (20504450052), we get a palindrome (45509890554).

The spelling of 25005440502 in words is "twenty-five billion, five million, four hundred forty thousand, five hundred two".