12155779872196 has 27 divisors (see below), whose sum is σ = 21386916095727. Its totient is φ = 6045406085160.

The previous prime is 12155779872193. The next prime is 12155779872199. The reversal of 12155779872196 is 69127897755121.

The square root of 12155779872196 is 3486514.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (12155779872193) and next prime (12155779872199).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12155779872193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1331843785 + ... + 1331852911.

Almost surely, 2^{12155779872196} is an apocalyptic number.

12155779872196 is the 3486514-th square number.

It is an amenable number.

12155779872196 is a deficient number, since it is larger than the sum of its proper divisors (9231136223531).

12155779872196 is an frugal number, since it uses more digits than its factorization.

12155779872196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18640 (or 9320 counting only the distinct ones).

The product of its digits is 133358400, while the sum is 70.

The spelling of 12155779872196 in words is "twelve trillion, one hundred fifty-five billion, seven hundred seventy-nine million, eight hundred seventy-two thousand, one hundred ninety-six".