11773828217 has 4 divisors (see below), whose sum is σ = 11774090100. Its totient is φ = 11773566336.

The previous prime is 11773828207. The next prime is 11773828267. The reversal of 11773828217 is 71282837711.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10290885136 + 1482943081 = 101444^2 + 38509^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11773828217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11773828207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44468 + ... + 159765.

It is an arithmetic number, because the mean of its divisors is an integer number (2943522525).

Almost surely, 2^11773828217 is an apocalyptic number.

It is an amenable number.

11773828217 is a deficient number, since it is larger than the sum of its proper divisors (261883).

11773828217 is an equidigital number, since it uses as much as digits as its factorization.

11773828217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261882.

The product of its digits is 263424, while the sum is 47.

The spelling of 11773828217 in words is "eleven billion, seven hundred seventy-three million, eight hundred twenty-eight thousand, two hundred seventeen".