25000321424 has 60 divisors (see below), whose sum is σ = 52546162500. Its totient is φ = 11517622272.

The previous prime is 25000321403. The next prime is 25000321441. The reversal of 25000321424 is 42412300052.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 6294835600 + 18705485824 = 79340^2 + 136768^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 25000321424.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1530452 + ... + 1546700.

It is an arithmetic number, because the mean of its divisors is an integer number (875769375).

Almost surely, 2^25000321424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25000321424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26273081250).

25000321424 is an abundant number, since it is smaller than the sum of its proper divisors (27545841076).

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

25000321424 is a wasteful number, since it uses less digits than its factorization.

25000321424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16852 (or 16833 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

Adding to 25000321424 its reverse (42412300052), we get a palindrome (67412621476).

The spelling of 25000321424 in words is "twenty-five billion, three hundred twenty-one thousand, four hundred twenty-four".