26453541661 has 2 divisors, whose sum is σ = 26453541662. Its totient is φ = 26453541660.

The previous prime is 26453541599. The next prime is 26453541689. The reversal of 26453541661 is 16614535462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25417924900 + 1035616761 = 159430^2 + 32181^2 .

It is a cyclic number.

It is not a de Polignac number, because 26453541661 - 2²⁵ = 26419987229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26453541691) 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, 13226770830 + 13226770831.

It is an arithmetic number, because the mean of its divisors is an integer number (13226770831).

Almost surely, 2^26453541661 is an apocalyptic number.

It is an amenable number.

26453541661 is a deficient number, since it is larger than the sum of its proper divisors (1).

26453541661 is an equidigital number, since it uses as much as digits as its factorization.

26453541661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 518400, while the sum is 43.

The spelling of 26453541661 in words is "twenty-six billion, four hundred fifty-three million, five hundred forty-one thousand, six hundred sixty-one".