25494220045 has 144 divisors (see below), whose sum is σ = 39937665600. Its totient is φ = 15524006400.

The previous prime is 25494220039. The next prime is 25494220091. The reversal of 25494220045 is 54002249452.

It is not a de Polignac number, because 25494220045 - 2¹¹ = 25494217997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25494219986 and 25494220013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 183411586 + ... + 183411724.

It is an arithmetic number, because the mean of its divisors is an integer number (277344900).

Almost surely, 2^25494220045 is an apocalyptic number.

It is an amenable number.

25494220045 is a deficient number, since it is larger than the sum of its proper divisors (14443445555).

25494220045 is a wasteful number, since it uses less digits than its factorization.

25494220045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280 (or 242 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 37.

Adding to 25494220045 its reverse (54002249452), we get a palindrome (79496469497).

The spelling of 25494220045 in words is "twenty-five billion, four hundred ninety-four million, two hundred twenty thousand, forty-five".