12355516197 has 20 divisors (see below), whose sum is σ = 18469033440. Its totient is φ = 8231643144.

The previous prime is 12355516189. The next prime is 12355516223. The reversal of 12355516197 is 79161555321.

12355516197 is a `hidden beast` number, since 1 + 2 + 3 + 5 + 551 + 6 + 1 + 97 = 666.

It is not a de Polignac number, because 12355516197 - 2³ = 12355516189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12355516157) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 77358 + ... + 175200.

It is an arithmetic number, because the mean of its divisors is an integer number (923451672).

Almost surely, 2^12355516197 is an apocalyptic number.

It is an amenable number.

12355516197 is a deficient number, since it is larger than the sum of its proper divisors (6113517243).

12355516197 is an equidigital number, since it uses as much as digits as its factorization.

12355516197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99414 (or 99405 counting only the distinct ones).

The product of its digits is 283500, while the sum is 45.

The spelling of 12355516197 in words is "twelve billion, three hundred fifty-five million, five hundred sixteen thousand, one hundred ninety-seven".