12143597761 has 4 divisors (see below), whose sum is σ = 12144188592. Its totient is φ = 12143006932.

The previous prime is 12143597759. The next prime is 12143597797. The reversal of 12143597761 is 16779534121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16779534121 = 7 ⋅2397076303.

It is a cyclic number.

It is not a de Polignac number, because 12143597761 - 2¹ = 12143597759 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12143597861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 263431 + ... + 306076.

It is an arithmetic number, because the mean of its divisors is an integer number (3036047148).

Almost surely, 2^12143597761 is an apocalyptic number.

It is an amenable number.

12143597761 is a deficient number, since it is larger than the sum of its proper divisors (590831).

12143597761 is an equidigital number, since it uses as much as digits as its factorization.

12143597761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590830.

The product of its digits is 317520, while the sum is 46.

The spelling of 12143597761 in words is "twelve billion, one hundred forty-three million, five hundred ninety-seven thousand, seven hundred sixty-one".