12323545665661 has 16 divisors (see below), whose sum is σ = 12457458874368. Its totient is φ = 12190218163200.

The previous prime is 12323545665637. The next prime is 12323545665677. The reversal of 12323545665661 is 16656654532321.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12323545665661 - 2¹⁷ = 12323545534589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12323545665161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 452376001 + ... + 452403241.

It is an arithmetic number, because the mean of its divisors is an integer number (778591179648).

Almost surely, 2^{12323545665661} is an apocalyptic number.

It is an amenable number.

12323545665661 is a deficient number, since it is larger than the sum of its proper divisors (133913208707).

12323545665661 is a wasteful number, since it uses less digits than its factorization.

12323545665661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37812.

The product of its digits is 23328000, while the sum is 55.

The spelling of 12323545665661 in words is "twelve trillion, three hundred twenty-three billion, five hundred forty-five million, six hundred sixty-five thousand, six hundred sixty-one".