12197993761 has 8 divisors (see below), whose sum is σ = 12330317664. Its totient is φ = 12065804160.

The previous prime is 12197993729. The next prime is 12197993779. The reversal of 12197993761 is 16739979121.

12197993761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12197993761 - 2⁵ = 12197993729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12197993791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154746 + ... + 219868.

It is an arithmetic number, because the mean of its divisors is an integer number (1541289708).

Almost surely, 2^12197993761 is an apocalyptic number.

It is an amenable number.

12197993761 is a deficient number, since it is larger than the sum of its proper divisors (132323903).

12197993761 is an equidigital number, since it uses as much as digits as its factorization.

12197993761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67151.

The product of its digits is 1285956, while the sum is 55.

The spelling of 12197993761 in words is "twelve billion, one hundred ninety-seven million, nine hundred ninety-three thousand, seven hundred sixty-one".