11573356889 has 2 divisors, whose sum is σ = 11573356890. Its totient is φ = 11573356888.

The previous prime is 11573356811. The next prime is 11573356901. The reversal of 11573356889 is 98865337511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7143123289 + 4430233600 = 84517^2 + 66560^2 .

It is an emirp because it is prime and its reverse (98865337511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11573356889 - 2³² = 7278389593 is a prime.

It is not a weakly prime, because it can be changed into another prime (11573356189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5786678444 + 5786678445.

It is an arithmetic number, because the mean of its divisors is an integer number (5786678445).

Almost surely, 2^11573356889 is an apocalyptic number.

It is an amenable number.

11573356889 is a deficient number, since it is larger than the sum of its proper divisors (1).

11573356889 is an equidigital number, since it uses as much as digits as its factorization.

11573356889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5443200, while the sum is 56.

The spelling of 11573356889 in words is "eleven billion, five hundred seventy-three million, three hundred fifty-six thousand, eight hundred eighty-nine".