25452312320 has 144 divisors (see below), whose sum is σ = 63717857280. Its totient is φ = 9731592192.

The previous prime is 25452312317. The next prime is 25452312343. The reversal of 25452312320 is 2321325452.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2581961 + ... + 2591799.

It is an arithmetic number, because the mean of its divisors is an integer number (442485120).

Almost surely, 2^25452312320 is an apocalyptic number.

25452312320 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 25452312320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31858928640).

25452312320 is an abundant number, since it is smaller than the sum of its proper divisors (38265544960).

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

25452312320 is an equidigital number, since it uses as much as digits as its factorization.

25452312320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9950 (or 9936 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 29.

Adding to 25452312320 its reverse (2321325452), we get a palindrome (27773637772).

The spelling of 25452312320 in words is "twenty-five billion, four hundred fifty-two million, three hundred twelve thousand, three hundred twenty".