25451232400 has 120 divisors (see below), whose sum is σ = 67366991808. Its totient is φ = 9163200000.

The previous prime is 25451232397. The next prime is 25451232413. The reversal of 25451232400 is 423215452.

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 23 ways as a sum of consecutive naturals, for example, 415765 + ... + 473035.

Almost surely, 2^25451232400 is an apocalyptic number.

25451232400 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 25451232400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33683495904).

25451232400 is an abundant number, since it is smaller than the sum of its proper divisors (41915759408).

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

25451232400 is a wasteful number, since it uses less digits than its factorization.

25451232400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57401 (or 57390 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

Adding to 25451232400 its reverse (423215452), we get a palindrome (25874447852).

The spelling of 25451232400 in words is "twenty-five billion, four hundred fifty-one million, two hundred thirty-two thousand, four hundred".