25002445122 has 80 divisors (see below), whose sum is σ = 59388963480. Its totient is φ = 7834724352.

The previous prime is 25002445121. The next prime is 25002445129. The reversal of 25002445122 is 22154420052.

It can be written as a sum of positive squares in 4 ways, for example, as 19407554721 + 5594890401 = 139311^2 + 74799^2 .

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

It is not an unprimeable number, because it can be changed into a prime (25002445121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2575654 + ... + 2585342.

Almost surely, 2^25002445122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25002445122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29694481740).

25002445122 is an abundant number, since it is smaller than the sum of its proper divisors (34386518358).

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

25002445122 is a wasteful number, since it uses less digits than its factorization.

25002445122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10657 (or 10648 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

Adding to 25002445122 its reverse (22154420052), we get a palindrome (47156865174).

The spelling of 25002445122 in words is "twenty-five billion, two million, four hundred forty-five thousand, one hundred twenty-two".