25445024642225 has 48 divisors (see below), whose sum is σ = 35167976426880. Its totient is φ = 18149304499200.

The previous prime is 25445024642209. The next prime is 25445024642227. The reversal of 25445024642225 is 52224642054452.

It is not a de Polignac number, because 25445024642225 - 2⁴ = 25445024642209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25445024642225.

It is not an unprimeable number, because it can be changed into a prime (25445024642227) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 176859419 + ... + 177003231.

It is an arithmetic number, because the mean of its divisors is an integer number (732666175560).

Almost surely, 2^{25445024642225} is an apocalyptic number.

25445024642225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25445024642225 is a deficient number, since it is larger than the sum of its proper divisors (9722951784655).

25445024642225 is a wasteful number, since it uses less digits than its factorization.

25445024642225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165770 (or 165765 counting only the distinct ones).

The product of its (nonzero) digits is 6144000, while the sum is 47.

Adding to 25445024642225 its reverse (52224642054452), we get a palindrome (77669666696677).

The spelling of 25445024642225 in words is "twenty-five trillion, four hundred forty-five billion, twenty-four million, six hundred forty-two thousand, two hundred twenty-five".