25250052505 has 16 divisors (see below), whose sum is σ = 31010273280. Its totient is φ = 19729988928.

The previous prime is 25250052491. The next prime is 25250052517. The reversal of 25250052505 is 50525005252.

It is a cyclic number.

It is not a de Polignac number, because 25250052505 - 2⁹ = 25250051993 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154545 + ... + 272734.

It is an arithmetic number, because the mean of its divisors is an integer number (1938142080).

Almost surely, 2^25250052505 is an apocalyptic number.

It is an amenable number.

25250052505 is a deficient number, since it is larger than the sum of its proper divisors (5760220775).

25250052505 is a wasteful number, since it uses less digits than its factorization.

25250052505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427560.

The product of its (nonzero) digits is 25000, while the sum is 31.

Adding to 25250052505 its reverse (50525005252), we get a palindrome (75775057757).

The spelling of 25250052505 in words is "twenty-five billion, two hundred fifty million, fifty-two thousand, five hundred five".