25561346136 has 16 divisors (see below), whose sum is σ = 63903365400. Its totient is φ = 8520448704.

The previous prime is 25561346131. The next prime is 25561346137. The reversal of 25561346136 is 63164316552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25561346131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 532528021 + ... + 532528068.

Almost surely, 2^25561346136 is an apocalyptic number.

It is an amenable number.

25561346136 is an abundant number, since it is smaller than the sum of its proper divisors (38342019264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25561346136 is a wasteful number, since it uses less digits than its factorization.

25561346136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065056098 (or 1065056094 counting only the distinct ones).

The product of its digits is 388800, while the sum is 42.

The spelling of 25561346136 in words is "twenty-five billion, five hundred sixty-one million, three hundred forty-six thousand, one hundred thirty-six".