11643174989 has 2 divisors, whose sum is σ = 11643174990. Its totient is φ = 11643174988.

The previous prime is 11643174947. The next prime is 11643175007. The reversal of 11643174989 is 98947134611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11026050025 + 617124964 = 105005^2 + 24842^2 .

It is a cyclic number.

It is not a de Polignac number, because 11643174989 - 2¹⁶ = 11643109453 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11643174989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11643174929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5821587494 + 5821587495.

It is an arithmetic number, because the mean of its divisors is an integer number (5821587495).

Almost surely, 2^11643174989 is an apocalyptic number.

It is an amenable number.

11643174989 is a deficient number, since it is larger than the sum of its proper divisors (1).

11643174989 is an equidigital number, since it uses as much as digits as its factorization.

11643174989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 53.

The spelling of 11643174989 in words is "eleven billion, six hundred forty-three million, one hundred seventy-four thousand, nine hundred eighty-nine".