11643264449 has 2 divisors, whose sum is σ = 11643264450. Its totient is φ = 11643264448.

The previous prime is 11643264439. The next prime is 11643264461. The reversal of 11643264449 is 94446234611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10976333824 + 666930625 = 104768^2 + 25825^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11643264449 is a prime.

It is not a weakly prime, because it can be changed into another prime (11643264439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5821632224 + 5821632225.

It is an arithmetic number, because the mean of its divisors is an integer number (5821632225).

Almost surely, 2^11643264449 is an apocalyptic number.

It is an amenable number.

11643264449 is a deficient number, since it is larger than the sum of its proper divisors (1).

11643264449 is an equidigital number, since it uses as much as digits as its factorization.

11643264449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 497664, while the sum is 44.

The spelling of 11643264449 in words is "eleven billion, six hundred forty-three million, two hundred sixty-four thousand, four hundred forty-nine".