26156161 has 2 divisors, whose sum is σ = 26156162. Its totient is φ = 26156160.

The previous prime is 26156159. The next prime is 26156167. The reversal of 26156161 is 16165162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25959025 + 197136 = 5095^2 + 444^2 .

It is a cyclic number.

It is not a de Polignac number, because 26156161 - 2¹ = 26156159 is a prime.

Together with 26156159, it forms a pair of twin primes.

It is equal to p_1633663 and since 26156161 and 1633663 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (26156167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13078080 + 13078081.

It is an arithmetic number, because the mean of its divisors is an integer number (13078081).

Almost surely, 2^26156161 is an apocalyptic number.

It is an amenable number.

26156161 is a deficient number, since it is larger than the sum of its proper divisors (1).

26156161 is an equidigital number, since it uses as much as digits as its factorization.

26156161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 28.

The square root of 26156161 is about 5114.3094353001. The cubic root of 26156161 is about 296.8415340448.

Subtracting from 26156161 its reverse (16165162), we obtain a palindrome (9990999).

The spelling of 26156161 in words is "twenty-six million, one hundred fifty-six thousand, one hundred sixty-one".