11644643669977 has 2 divisors, whose sum is σ = 11644643669978. Its totient is φ = 11644643669976.

The previous prime is 11644643669959. The next prime is 11644643670031. The reversal of 11644643669977 is 77996634644611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8584876560016 + 3059767109961 = 2929996^2 + 1749219^2 .

It is a cyclic number.

It is not a de Polignac number, because 11644643669977 - 2³¹ = 11642496186329 is a prime.

It is not a weakly prime, because it can be changed into another prime (11644643619977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5822321834988 + 5822321834989.

It is an arithmetic number, because the mean of its divisors is an integer number (5822321834989).

Almost surely, 2^{11644643669977} is an apocalyptic number.

It is an amenable number.

11644643669977 is a deficient number, since it is larger than the sum of its proper divisors (1).

11644643669977 is an equidigital number, since it uses as much as digits as its factorization.

11644643669977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 987614208, while the sum is 73.

The spelling of 11644643669977 in words is "eleven trillion, six hundred forty-four billion, six hundred forty-three million, six hundred sixty-nine thousand, nine hundred seventy-seven".