12172322208 has 48 divisors (see below), whose sum is σ = 31959004896. Its totient is φ = 4056595200.

The previous prime is 12172322191. The next prime is 12172322209. The reversal of 12172322208 is 80222327121.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (12172322209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 594835 + ... + 614957.

It is an arithmetic number, because the mean of its divisors is an integer number (665812602).

Almost surely, 2^12172322208 is an apocalyptic number.

It is an amenable number.

12172322208 is an abundant number, since it is smaller than the sum of its proper divisors (19786682688).

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

12172322208 is a wasteful number, since it uses less digits than its factorization.

12172322208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26437 (or 26429 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

Adding to 12172322208 its reverse (80222327121), we get a palindrome (92394649329).

The spelling of 12172322208 in words is "twelve billion, one hundred seventy-two million, three hundred twenty-two thousand, two hundred eight".