25566010136 has 8 divisors (see below), whose sum is σ = 47936269020. Its totient is φ = 12783005064.

The previous prime is 25566010121. The next prime is 25566010163. The reversal of 25566010136 is 63101066552.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 25566010096 and 25566010105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1597875626 + ... + 1597875641.

Almost surely, 2^25566010136 is an apocalyptic number.

It is an amenable number.

25566010136 is a deficient number, since it is larger than the sum of its proper divisors (22370258884).

25566010136 is a wasteful number, since it uses less digits than its factorization.

25566010136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3195751273 (or 3195751269 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 35.

Adding to 25566010136 its reverse (63101066552), we get a palindrome (88667076688).

The spelling of 25566010136 in words is "twenty-five billion, five hundred sixty-six million, ten thousand, one hundred thirty-six".