26156551 has 2 divisors, whose sum is σ = 26156552. Its totient is φ = 26156550.

The previous prime is 26156531. The next prime is 26156561. The reversal of 26156551 is 15565162.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26156551 - 2⁵ = 26156519 is a prime.

It is a Chen prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26156531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13078275 + 13078276.

It is an arithmetic number, because the mean of its divisors is an integer number (13078276).

Almost surely, 2^26156551 is an apocalyptic number.

26156551 is a deficient number, since it is larger than the sum of its proper divisors (1).

26156551 is an equidigital number, since it uses as much as digits as its factorization.

26156551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9000, while the sum is 31.

The square root of 26156551 is about 5114.3475634728. The cubic root of 26156551 is about 296.8430093839.

The spelling of 26156551 in words is "twenty-six million, one hundred fifty-six thousand, five hundred fifty-one".