25255521310400 has 84 divisors (see below), whose sum is σ = 62167713837552. Its totient is φ = 10098413276160.

The previous prime is 25255521310379. The next prime is 25255521310403. The reversal of 25255521310400 is 401312555252.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (25255521310403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1297094 + ... + 7224506.

Almost surely, 2^{25255521310400} is an apocalyptic number.

25255521310400 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 25255521310400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31083856918776).

25255521310400 is an abundant number, since it is smaller than the sum of its proper divisors (36912192527152).

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

25255521310400 is a wasteful number, since it uses less digits than its factorization.

25255521310400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5930098 (or 5930083 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 35.

Adding to 25255521310400 its reverse (401312555252), we get a palindrome (25656833865652).

The spelling of 25255521310400 in words is "twenty-five trillion, two hundred fifty-five billion, five hundred twenty-one million, three hundred ten thousand, four hundred".