25553401225 has 24 divisors (see below), whose sum is σ = 35004366720. Its totient is φ = 18349032000.

The previous prime is 25553401219. The next prime is 25553401229. The reversal of 25553401225 is 52210435552.

It is not a de Polignac number, because 25553401225 - 2³³ = 16963466633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25553401229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 566386 + ... + 609835.

It is an arithmetic number, because the mean of its divisors is an integer number (1458515280).

Almost surely, 2^25553401225 is an apocalyptic number.

25553401225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25553401225 is a deficient number, since it is larger than the sum of its proper divisors (9450965495).

25553401225 is a wasteful number, since it uses less digits than its factorization.

25553401225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176321 (or 1176316 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 34.

Adding to 25553401225 its reverse (52210435552), we get a palindrome (77763836777).

The spelling of 25553401225 in words is "twenty-five billion, five hundred fifty-three million, four hundred one thousand, two hundred twenty-five".