12170878198 has 36 divisors (see below), whose sum is σ = 18992220660. Its totient is φ = 5849488656.

The previous prime is 12170878193. The next prime is 12170878229. The reversal of 12170878198 is 89187807121.

It is a super-2 number, since 2×12170878198² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12170878193) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 29047233 + ... + 29047651.

It is an arithmetic number, because the mean of its divisors is an integer number (527561685).

Almost surely, 2^12170878198 is an apocalyptic number.

12170878198 is a deficient number, since it is larger than the sum of its proper divisors (6821342462).

12170878198 is an equidigital number, since it uses as much as digits as its factorization.

12170878198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701 (or 561 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 52.

The spelling of 12170878198 in words is "twelve billion, one hundred seventy million, eight hundred seventy-eight thousand, one hundred ninety-eight".