26502640163 has 2 divisors, whose sum is σ = 26502640164. Its totient is φ = 26502640162.

The previous prime is 26502640141. The next prime is 26502640193. The reversal of 26502640163 is 36104620562.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26502640163 - 2¹⁰ = 26502639139 is a prime.

It is not a weakly prime, because it can be changed into another prime (26502640133) 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 as a sum of consecutive naturals, namely, 13251320081 + 13251320082.

It is an arithmetic number, because the mean of its divisors is an integer number (13251320082).

Almost surely, 2^26502640163 is an apocalyptic number.

26502640163 is a deficient number, since it is larger than the sum of its proper divisors (1).

26502640163 is an equidigital number, since it uses as much as digits as its factorization.

26502640163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 35.

The spelling of 26502640163 in words is "twenty-six billion, five hundred two million, six hundred forty thousand, one hundred sixty-three".