11809666416 has 20 divisors (see below), whose sum is σ = 30508305032. Its totient is φ = 3936555456.

The previous prime is 11809666357. The next prime is 11809666417. The reversal of 11809666416 is 61466690811.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 246034717 = 11809666416 / (1 + 1 + 8 + 0 + 9 + 6 + 6 + 6 + 4 + 1 + 6).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11809666417) 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, 123017311 + ... + 123017406.

Almost surely, 2^11809666416 is an apocalyptic number.

11809666416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11809666416 is an abundant number, since it is smaller than the sum of its proper divisors (18698638616).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11809666416 is a wasteful number, since it uses less digits than its factorization.

11809666416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246034728 (or 246034722 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 48.

The spelling of 11809666416 in words is "eleven billion, eight hundred nine million, six hundred sixty-six thousand, four hundred sixteen".