11505780233 has 2 divisors, whose sum is σ = 11505780234. Its totient is φ = 11505780232.

The previous prime is 11505780203. The next prime is 11505780259. The reversal of 11505780233 is 33208750511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10095627529 + 1410152704 = 100477^2 + 37552^2 .

It is an emirp because it is prime and its reverse (33208750511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11505780233 - 2⁸ = 11505779977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11505780193 and 11505780202.

It is not a weakly prime, because it can be changed into another prime (11505780203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5752890116 + 5752890117.

It is an arithmetic number, because the mean of its divisors is an integer number (5752890117).

Almost surely, 2^11505780233 is an apocalyptic number.

It is an amenable number.

11505780233 is a deficient number, since it is larger than the sum of its proper divisors (1).

11505780233 is an equidigital number, since it uses as much as digits as its factorization.

11505780233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 35.

The spelling of 11505780233 in words is "eleven billion, five hundred five million, seven hundred eighty thousand, two hundred thirty-three".