18010475261 has 2 divisors, whose sum is σ = 18010475262. Its totient is φ = 18010475260.

The previous prime is 18010475227. The next prime is 18010475303. The reversal of 18010475261 is 16257401081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18001588900 + 8886361 = 134170^2 + 2981^2 .

It is a cyclic number.

It is not a de Polignac number, because 18010475261 - 2¹⁴ = 18010458877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18010472261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9005237630 + 9005237631.

It is an arithmetic number, because the mean of its divisors is an integer number (9005237631).

Almost surely, 2^18010475261 is an apocalyptic number.

It is an amenable number.

18010475261 is a deficient number, since it is larger than the sum of its proper divisors (1).

18010475261 is an equidigital number, since it uses as much as digits as its factorization.

18010475261 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 18010475261 in words is "eighteen billion, ten million, four hundred seventy-five thousand, two hundred sixty-one".