12081815917 has 8 divisors (see below), whose sum is σ = 12390118272. Its totient is φ = 11774162400.

The previous prime is 12081815903. The next prime is 12081815929. The reversal of 12081815917 is 71951818021.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12081815917 - 2¹⁵ = 12081783149 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 (12081815987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124383 + ... + 199084.

It is an arithmetic number, because the mean of its divisors is an integer number (1548764784).

Almost surely, 2^12081815917 is an apocalyptic number.

It is an amenable number.

12081815917 is a deficient number, since it is larger than the sum of its proper divisors (308302355).

12081815917 is an equidigital number, since it uses as much as digits as its factorization.

12081815917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324419.

The product of its (nonzero) digits is 40320, while the sum is 43.

The spelling of 12081815917 in words is "twelve billion, eighty-one million, eight hundred fifteen thousand, nine hundred seventeen".