11356917989 has 4 divisors (see below), whose sum is σ = 11850697056. Its totient is φ = 10863138924.

The previous prime is 11356917839. The next prime is 11356917997. The reversal of 11356917989 is 98971965311.

11356917989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 11356917989 - 2¹⁶ = 11356852453 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 (11356917589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 246889499 + ... + 246889544.

It is an arithmetic number, because the mean of its divisors is an integer number (2962674264).

Almost surely, 2^11356917989 is an apocalyptic number.

It is an amenable number.

11356917989 is a deficient number, since it is larger than the sum of its proper divisors (493779067).

11356917989 is an equidigital number, since it uses as much as digits as its factorization.

11356917989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493779066.

The product of its digits is 3674160, while the sum is 59.

The spelling of 11356917989 in words is "eleven billion, three hundred fifty-six million, nine hundred seventeen thousand, nine hundred eighty-nine".