11811215986 has 8 divisors (see below), whose sum is σ = 17742765744. Its totient is φ = 5896960740.

The previous prime is 11811215971. The next prime is 11811216017. The reversal of 11811215986 is 68951211811.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4321920 + ... + 4324651.

It is an arithmetic number, because the mean of its divisors is an integer number (2217845718).

Almost surely, 2^11811215986 is an apocalyptic number.

11811215986 is a deficient number, since it is larger than the sum of its proper divisors (5931549758).

11811215986 is an equidigital number, since it uses as much as digits as its factorization.

11811215986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8647256.

The product of its digits is 34560, while the sum is 43.

The spelling of 11811215986 in words is "eleven billion, eight hundred eleven million, two hundred fifteen thousand, nine hundred eighty-six".