25605201114209 has 4 divisors (see below), whose sum is σ = 25622994862080. Its totient is φ = 25587407366340.

The previous prime is 25605201114197. The next prime is 25605201114223. The reversal of 25605201114209 is 90241110250652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25605201114209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25605201114289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8896871777 + ... + 8896874654.

It is an arithmetic number, because the mean of its divisors is an integer number (6405748715520).

Almost surely, 2^{25605201114209} is an apocalyptic number.

It is an amenable number.

25605201114209 is a deficient number, since it is larger than the sum of its proper divisors (17793747871).

25605201114209 is a wasteful number, since it uses less digits than its factorization.

25605201114209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17793747870.

The product of its (nonzero) digits is 43200, while the sum is 38.

The spelling of 25605201114209 in words is "twenty-five trillion, six hundred five billion, two hundred one million, one hundred fourteen thousand, two hundred nine".