11805138852 has 24 divisors (see below), whose sum is σ = 29664195456. Its totient is φ = 3632350368.

The previous prime is 11805138833. The next prime is 11805138869. The reversal of 11805138852 is 25883150811.

It is a super-2 number, since 2×11805138852² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37836828 + ... + 37837139.

It is an arithmetic number, because the mean of its divisors is an integer number (1236008144).

Almost surely, 2^11805138852 is an apocalyptic number.

11805138852 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11805138852 is an abundant number, since it is smaller than the sum of its proper divisors (17859056604).

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

11805138852 is a wasteful number, since it uses less digits than its factorization.

11805138852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75673987 (or 75673985 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 42.

The spelling of 11805138852 in words is "eleven billion, eight hundred five million, one hundred thirty-eight thousand, eight hundred fifty-two".