18282775261 has 2 divisors, whose sum is σ = 18282775262. Its totient is φ = 18282775260.

The previous prime is 18282775241. The next prime is 18282775333. The reversal of 18282775261 is 16257728281.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9229252761 + 9053522500 = 96069^2 + 95150^2 .

It is an emirp because it is prime and its reverse (16257728281) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18282775261 - 2⁹ = 18282774749 is a prime.

It is a super-3 number, since 3×18282775261³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18282775201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9141387630 + 9141387631.

It is an arithmetic number, because the mean of its divisors is an integer number (9141387631).

Almost surely, 2^18282775261 is an apocalyptic number.

It is an amenable number.

18282775261 is a deficient number, since it is larger than the sum of its proper divisors (1).

18282775261 is an equidigital number, since it uses as much as digits as its factorization.

18282775261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 752640, while the sum is 49.

The spelling of 18282775261 in words is "eighteen billion, two hundred eighty-two million, seven hundred seventy-five thousand, two hundred sixty-one".