11969773809 has 16 divisors (see below), whose sum is σ = 18868609920. Its totient is φ = 6604012800.

The previous prime is 11969773799. The next prime is 11969773841. The reversal of 11969773809 is 90837796911.

It is a de Polignac number, because none of the positive numbers 2^k-11969773809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11969773889) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9826792 + ... + 9828009.

It is an arithmetic number, because the mean of its divisors is an integer number (1179288120).

Almost surely, 2^11969773809 is an apocalyptic number.

It is an amenable number.

11969773809 is a deficient number, since it is larger than the sum of its proper divisors (6898836111).

11969773809 is a wasteful number, since it uses less digits than its factorization.

11969773809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19654840.

The product of its (nonzero) digits is 5143824, while the sum is 60.

The spelling of 11969773809 in words is "eleven billion, nine hundred sixty-nine million, seven hundred seventy-three thousand, eight hundred nine".