25123352017 has 4 divisors (see below), whose sum is σ = 25367268160. Its totient is φ = 24879435876.

The previous prime is 25123351997. The next prime is 25123352021. The reversal of 25123352017 is 71025332152.

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 25123352017 - 2⁷ = 25123351889 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25123352017.

It is not an unprimeable number, because it can be changed into a prime (25123352027) 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, 121957917 + ... + 121958122.

It is an arithmetic number, because the mean of its divisors is an integer number (6341817040).

Almost surely, 2^25123352017 is an apocalyptic number.

It is an amenable number.

25123352017 is a deficient number, since it is larger than the sum of its proper divisors (243916143).

25123352017 is a wasteful number, since it uses less digits than its factorization.

25123352017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243916142.

The product of its (nonzero) digits is 12600, while the sum is 31.

Adding to 25123352017 its reverse (71025332152), we get a palindrome (96148684169).

The spelling of 25123352017 in words is "twenty-five billion, one hundred twenty-three million, three hundred fifty-two thousand, seventeen".