11826078217 has 2 divisors, whose sum is σ = 11826078218. Its totient is φ = 11826078216.

The previous prime is 11826078193. The next prime is 11826078259. The reversal of 11826078217 is 71287062811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10542360976 + 1283717241 = 102676^2 + 35829^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11826078217 is a prime.

It is a super-2 number, since 2×11826078217² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11826076217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5913039108 + 5913039109.

It is an arithmetic number, because the mean of its divisors is an integer number (5913039109).

Almost surely, 2^11826078217 is an apocalyptic number.

It is an amenable number.

11826078217 is a deficient number, since it is larger than the sum of its proper divisors (1).

11826078217 is an equidigital number, since it uses as much as digits as its factorization.

11826078217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75264, while the sum is 43.

The spelling of 11826078217 in words is "eleven billion, eight hundred twenty-six million, seventy-eight thousand, two hundred seventeen".