25644345615145 has 8 divisors (see below), whose sum is σ = 31277693668680. Its totient is φ = 20179157205120.

The previous prime is 25644345615139. The next prime is 25644345615167. The reversal of 25644345615145 is 54151654344652.

It can be written as a sum of positive squares in 4 ways, for example, as 929965136409 + 24714380478736 = 964347^2 + 4971356^2 .

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

It is not a de Polignac number, because 25644345615145 - 2⁵ = 25644345615113 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42039910540 + ... + 42039911149.

It is an arithmetic number, because the mean of its divisors is an integer number (3909711708585).

Almost surely, 2^{25644345615145} is an apocalyptic number.

It is an amenable number.

25644345615145 is a deficient number, since it is larger than the sum of its proper divisors (5633348053535).

25644345615145 is an equidigital number, since it uses as much as digits as its factorization.

25644345615145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84079821755.

The product of its digits is 34560000, while the sum is 55.

Adding to 25644345615145 its reverse (54151654344652), we get a palindrome (79795999959797).

The spelling of 25644345615145 in words is "twenty-five trillion, six hundred forty-four billion, three hundred forty-five million, six hundred fifteen thousand, one hundred forty-five".