25205663012047 has 4 divisors (see below), whose sum is σ = 28806472013776. Its totient is φ = 21604854010320.

The previous prime is 25205663012017. The next prime is 25205663012059. The reversal of 25205663012047 is 74021036650252.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 25205663012047 - 2²⁷ = 25205528794319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25205663011994 and 25205663012012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25205663012017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1800404500854 + ... + 1800404500867.

It is an arithmetic number, because the mean of its divisors is an integer number (7201618003444).

Almost surely, 2^{25205663012047} is an apocalyptic number.

25205663012047 is a deficient number, since it is larger than the sum of its proper divisors (3600809001729).

25205663012047 is an equidigital number, since it uses as much as digits as its factorization.

25205663012047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3600809001728.

The product of its (nonzero) digits is 604800, while the sum is 43.

Adding to 25205663012047 its reverse (74021036650252), we get a palindrome (99226699662299).

The spelling of 25205663012047 in words is "twenty-five trillion, two hundred five billion, six hundred sixty-three million, twelve thousand, forty-seven".