11918071865 has 8 divisors (see below), whose sum is σ = 16344784320. Its totient is φ = 8172392112.

The previous prime is 11918071807. The next prime is 11918071871. The reversal of 11918071865 is 56817081911.

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 11918071865 - 2¹⁴ = 11918055481 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170258135 + ... + 170258204.

It is an arithmetic number, because the mean of its divisors is an integer number (2043098040).

Almost surely, 2^11918071865 is an apocalyptic number.

It is an amenable number.

11918071865 is a deficient number, since it is larger than the sum of its proper divisors (4426712455).

11918071865 is an equidigital number, since it uses as much as digits as its factorization.

11918071865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340516351.

The product of its (nonzero) digits is 120960, while the sum is 47.

The spelling of 11918071865 in words is "eleven billion, nine hundred eighteen million, seventy-one thousand, eight hundred sixty-five".