11156661343 has 4 divisors (see below), whose sum is σ = 11218989240. Its totient is φ = 11094333448.

The previous prime is 11156661317. The next prime is 11156661379. The reversal of 11156661343 is 34316665111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34316665111 = 19 ⋅1806140269.

It is a cyclic number.

It is not a de Polignac number, because 11156661343 - 2⁹ = 11156660831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11156668343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31163680 + ... + 31164037.

It is an arithmetic number, because the mean of its divisors is an integer number (2804747310).

Almost surely, 2^11156661343 is an apocalyptic number.

11156661343 is a deficient number, since it is larger than the sum of its proper divisors (62327897).

11156661343 is an equidigital number, since it uses as much as digits as its factorization.

11156661343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62327896.

The product of its digits is 38880, while the sum is 37.

The spelling of 11156661343 in words is "eleven billion, one hundred fifty-six million, six hundred sixty-one thousand, three hundred forty-three".