25163000505 has 24 divisors (see below), whose sum is σ = 44330886600. Its totient is φ = 13200261120.

The previous prime is 25163000413. The next prime is 25163000543. The reversal of 25163000505 is 50500036152.

25163000505 is a `hidden beast` number, since 25 + 1 + 630 + 0 + 0 + 5 + 0 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 27751824 + 25135248681 = 5268^2 + 158541^2 .

It is not a de Polignac number, because 25163000505 - 2⁷ = 25163000377 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4580680 + ... + 4586169.

It is an arithmetic number, because the mean of its divisors is an integer number (1847120275).

Almost surely, 2^25163000505 is an apocalyptic number.

It is an amenable number.

25163000505 is a deficient number, since it is larger than the sum of its proper divisors (19167886095).

25163000505 is a wasteful number, since it uses less digits than its factorization.

25163000505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9166921 (or 9166918 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

Adding to 25163000505 its reverse (50500036152), we get a palindrome (75663036657).

The spelling of 25163000505 in words is "twenty-five billion, one hundred sixty-three million, five hundred five", and thus it is an aban number.