11778871105297 has 2 divisors, whose sum is σ = 11778871105298. Its totient is φ = 11778871105296.

The previous prime is 11778871105237. The next prime is 11778871105399. The reversal of 11778871105297 is 79250117887711.

It is a Cunningham number, because it is equal to 3432036²+1.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11778871105296 + 1 = 3432036^2 + 1^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11778871105297 is a prime.

It is a super-2 number, since 2×11778871105297² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11778871105237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5889435552648 + 5889435552649.

It is an arithmetic number, because the mean of its divisors is an integer number (5889435552649).

Almost surely, 2^{11778871105297} is an apocalyptic number.

It is an amenable number.

11778871105297 is a deficient number, since it is larger than the sum of its proper divisors (1).

11778871105297 is an equidigital number, since it uses as much as digits as its factorization.

11778871105297 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13829760, while the sum is 64.

The spelling of 11778871105297 in words is "eleven trillion, seven hundred seventy-eight billion, eight hundred seventy-one million, one hundred five thousand, two hundred ninety-seven".