25644405145 has 8 divisors (see below), whose sum is σ = 31488944256. Its totient is φ = 20038418736.

The previous prime is 25644405067. The next prime is 25644405173. The reversal of 25644405145 is 54150444652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25644405145 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25644405098 and 25644405107.

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 7 ways as a sum of consecutive naturals, for example, 59637937 + ... + 59638366.

It is an arithmetic number, because the mean of its divisors is an integer number (3936118032).

Almost surely, 2^25644405145 is an apocalyptic number.

It is an amenable number.

25644405145 is a deficient number, since it is larger than the sum of its proper divisors (5844539111).

25644405145 is a wasteful number, since it uses less digits than its factorization.

25644405145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119276351.

The product of its (nonzero) digits is 384000, while the sum is 40.

Adding to 25644405145 its reverse (54150444652), we get a palindrome (79794849797).

The spelling of 25644405145 in words is "twenty-five billion, six hundred forty-four million, four hundred five thousand, one hundred forty-five".