12169891700 has 36 divisors (see below), whose sum is σ = 26542762092. Its totient is φ = 4843238400.

The previous prime is 12169891661. The next prime is 12169891703. The reversal of 12169891700 is 719896121.

It can be written as a sum of positive squares in 6 ways, for example, as 1029511396 + 11140380304 = 32086^2 + 105548^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12169891703) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 289181 + ... + 328580.

It is an arithmetic number, because the mean of its divisors is an integer number (737298947).

Almost surely, 2^12169891700 is an apocalyptic number.

12169891700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12169891700 is an abundant number, since it is smaller than the sum of its proper divisors (14372870392).

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

12169891700 is a wasteful number, since it uses less digits than its factorization.

12169891700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617972 (or 617965 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 44.

The spelling of 12169891700 in words is "twelve billion, one hundred sixty-nine million, eight hundred ninety-one thousand, seven hundred".