261116633 has 2 divisors, whose sum is σ = 261116634. Its totient is φ = 261116632.

The previous prime is 261116593. The next prime is 261116707. The reversal of 261116633 is 336611162.

It is a happy number.

261116633 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 195636169 + 65480464 = 13987^2 + 8092^2 .

It is a cyclic number.

It is not a de Polignac number, because 261116633 - 2¹⁴ = 261100249 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 261116596 and 261116605.

It is not a weakly prime, because it can be changed into another prime (261116333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130558316 + 130558317.

It is an arithmetic number, because the mean of its divisors is an integer number (130558317).

Almost surely, 2^261116633 is an apocalyptic number.

It is an amenable number.

261116633 is a deficient number, since it is larger than the sum of its proper divisors (1).

261116633 is an equidigital number, since it uses as much as digits as its factorization.

261116633 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 29.

The square root of 261116633 is about 16159.1037189567. The cubic root of 261116633 is about 639.1628319940.

Adding to 261116633 its reverse (336611162), we get a palindrome (597727795).

The spelling of 261116633 in words is "two hundred sixty-one million, one hundred sixteen thousand, six hundred thirty-three".