12143853661 has 8 divisors (see below), whose sum is σ = 12865648824. Its totient is φ = 11422886400.

The previous prime is 12143853647. The next prime is 12143853713. The reversal of 12143853661 is 16635834121.

It can be written as a sum of positive squares in 4 ways, for example, as 6560028036 + 5583825625 = 80994^2 + 74725^2 .

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 12143853661 - 2⁹ = 12143853149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12143853611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176640 + ... + 235561.

It is an arithmetic number, because the mean of its divisors is an integer number (1608206103).

Almost surely, 2^12143853661 is an apocalyptic number.

It is an amenable number.

12143853661 is a deficient number, since it is larger than the sum of its proper divisors (721795163).

12143853661 is a wasteful number, since it uses less digits than its factorization.

12143853661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413951.

The product of its digits is 103680, while the sum is 40.

The spelling of 12143853661 in words is "twelve billion, one hundred forty-three million, eight hundred fifty-three thousand, six hundred sixty-one".