11647747649 has 2 divisors, whose sum is σ = 11647747650. Its totient is φ = 11647747648.

The previous prime is 11647747627. The next prime is 11647747673. The reversal of 11647747649 is 94674774611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9209857024 + 2437890625 = 95968^2 + 49375^2 .

It is an emirp because it is prime and its reverse (94674774611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11647747649 - 2⁸ = 11647747393 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 = 11647747594 and 11647747603.

It is not a weakly prime, because it can be changed into another prime (11647747049) 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, 5823873824 + 5823873825.

It is an arithmetic number, because the mean of its divisors is an integer number (5823873825).

Almost surely, 2^11647747649 is an apocalyptic number.

It is an amenable number.

11647747649 is a deficient number, since it is larger than the sum of its proper divisors (1).

11647747649 is an equidigital number, since it uses as much as digits as its factorization.

11647747649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7112448, while the sum is 56.

The spelling of 11647747649 in words is "eleven billion, six hundred forty-seven million, seven hundred forty-seven thousand, six hundred forty-nine".