11865785118 has 32 divisors (see below), whose sum is σ = 26327790720. Its totient is φ = 3534747360.

The previous prime is 11865785083. The next prime is 11865785119. The reversal of 11865785118 is 81158756811.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11865785119) 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, 1519705 + ... + 1527492.

It is an arithmetic number, because the mean of its divisors is an integer number (822743460).

Almost surely, 2^11865785118 is an apocalyptic number.

11865785118 is an abundant number, since it is smaller than the sum of its proper divisors (14462005602).

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

11865785118 is a wasteful number, since it uses less digits than its factorization.

11865785118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3047272.

The product of its digits is 537600, while the sum is 51.

The spelling of 11865785118 in words is "eleven billion, eight hundred sixty-five million, seven hundred eighty-five thousand, one hundred eighteen".