11912191860 has 24 divisors (see below), whose sum is σ = 33354137376. Its totient is φ = 3176584480.

The previous prime is 11912191859. The next prime is 11912191883. The reversal of 11912191860 is 6819121911.

11912191860 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99268206 + ... + 99268325.

It is an arithmetic number, because the mean of its divisors is an integer number (1389755724).

Almost surely, 2^11912191860 is an apocalyptic number.

11912191860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11912191860 is an abundant number, since it is smaller than the sum of its proper divisors (21441945516).

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

11912191860 is a wasteful number, since it uses less digits than its factorization.

11912191860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198536543 (or 198536541 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 39.

The spelling of 11912191860 in words is "eleven billion, nine hundred twelve million, one hundred ninety-one thousand, eight hundred sixty".