11345566889 has 4 divisors (see below), whose sum is σ = 11371769556. Its totient is φ = 11319364224.

The previous prime is 11345566877. The next prime is 11345566931. The reversal of 11345566889 is 98866554311.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3173406889 + 8172160000 = 56333^2 + 90400^2 .

It is a cyclic number.

It is not a de Polignac number, because 11345566889 - 2¹² = 11345562793 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (11345566819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13100684 + ... + 13101549.

It is an arithmetic number, because the mean of its divisors is an integer number (2842942389).

Almost surely, 2^11345566889 is an apocalyptic number.

It is an amenable number.

11345566889 is a deficient number, since it is larger than the sum of its proper divisors (26202667).

11345566889 is an equidigital number, since it uses as much as digits as its factorization.

11345566889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26202666.

The product of its digits is 6220800, while the sum is 56.

The spelling of 11345566889 in words is "eleven billion, three hundred forty-five million, five hundred sixty-six thousand, eight hundred eighty-nine".