25647755117 has 4 divisors (see below), whose sum is σ = 25648225056. Its totient is φ = 25647285180.

The previous prime is 25647754999. The next prime is 25647755129. The reversal of 25647755117 is 71155774652.

It is a happy number.

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 not a de Polignac number, because 25647755117 - 2¹² = 25647751021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25647755167) 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, 140423 + ... + 266484.

It is an arithmetic number, because the mean of its divisors is an integer number (6412056264).

Almost surely, 2^25647755117 is an apocalyptic number.

It is an amenable number.

25647755117 is a deficient number, since it is larger than the sum of its proper divisors (469939).

25647755117 is an equidigital number, since it uses as much as digits as its factorization.

25647755117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469938.

The product of its digits is 2058000, while the sum is 50.

The spelling of 25647755117 in words is "twenty-five billion, six hundred forty-seven million, seven hundred fifty-five thousand, one hundred seventeen".