12170743812 has 72 divisors (see below), whose sum is σ = 31646160000. Its totient is φ = 3941955648.

The previous prime is 12170743807. The next prime is 12170743841. The reversal of 12170743812 is 21834707121.

12170743812 is a `hidden beast` number, since 1 + 217 + 0 + 7 + 438 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 209314 + ... + 261062.

It is an arithmetic number, because the mean of its divisors is an integer number (439530000).

Almost surely, 2^12170743812 is an apocalyptic number.

12170743812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12170743812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15823080000).

12170743812 is an abundant number, since it is smaller than the sum of its proper divisors (19475416188).

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

12170743812 is a wasteful number, since it uses less digits than its factorization.

12170743812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51945 (or 51940 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The spelling of 12170743812 in words is "twelve billion, one hundred seventy million, seven hundred forty-three thousand, eight hundred twelve".