25886702161 has 4 divisors (see below), whose sum is σ = 25893685300. Its totient is φ = 25879719024.

The previous prime is 25886702119. The next prime is 25886702173. The reversal of 25886702161 is 16120768852.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16948134225 + 8938567936 = 130185^2 + 94544^2 .

It is a cyclic number.

It is not a de Polignac number, because 25886702161 - 2²¹ = 25884605009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25856702161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3486006 + ... + 3493423.

It is an arithmetic number, because the mean of its divisors is an integer number (6473421325).

Almost surely, 2^25886702161 is an apocalyptic number.

It is an amenable number.

25886702161 is a deficient number, since it is larger than the sum of its proper divisors (6983139).

25886702161 is an equidigital number, since it uses as much as digits as its factorization.

25886702161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6983138.

The product of its (nonzero) digits is 322560, while the sum is 46.

The spelling of 25886702161 in words is "twenty-five billion, eight hundred eighty-six million, seven hundred two thousand, one hundred sixty-one".