18025127261 has 2 divisors, whose sum is σ = 18025127262. Its totient is φ = 18025127260.

The previous prime is 18025127189. The next prime is 18025127279. The reversal of 18025127261 is 16272152081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17549625625 + 475501636 = 132475^2 + 21806^2 .

It is a cyclic number.

It is not a de Polignac number, because 18025127261 - 2¹⁰ = 18025126237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18025126261) 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, 9012563630 + 9012563631.

It is an arithmetic number, because the mean of its divisors is an integer number (9012563631).

Almost surely, 2^18025127261 is an apocalyptic number.

It is an amenable number.

18025127261 is a deficient number, since it is larger than the sum of its proper divisors (1).

18025127261 is an equidigital number, since it uses as much as digits as its factorization.

18025127261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 35.

The spelling of 18025127261 in words is "eighteen billion, twenty-five million, one hundred twenty-seven thousand, two hundred sixty-one".