26552221909 has 2 divisors, whose sum is σ = 26552221910. Its totient is φ = 26552221908.

The previous prime is 26552221901. The next prime is 26552221931. The reversal of 26552221909 is 90912225562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17808101809 + 8744120100 = 133447^2 + 93510^2 .

It is a cyclic number.

It is not a de Polignac number, because 26552221909 - 2³ = 26552221901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26552221901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13276110954 + 13276110955.

It is an arithmetic number, because the mean of its divisors is an integer number (13276110955).

Almost surely, 2^26552221909 is an apocalyptic number.

It is an amenable number.

26552221909 is a deficient number, since it is larger than the sum of its proper divisors (1).

26552221909 is an equidigital number, since it uses as much as digits as its factorization.

26552221909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 194400, while the sum is 43.

The spelling of 26552221909 in words is "twenty-six billion, five hundred fifty-two million, two hundred twenty-one thousand, nine hundred nine".