12323565650561 has 16 divisors (see below), whose sum is σ = 13653378672768. Its totient is φ = 11029133606400.

The previous prime is 12323565650549. The next prime is 12323565650573. The reversal of 12323565650561 is 16505656532321.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12323565650549) and next prime (12323565650573).

It is a cyclic number.

It is not a de Polignac number, because 12323565650561 - 2⁶ = 12323565650497 is a prime.

It is a super-2 number, since 2×12323565650561² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12323565650521) 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, 11125040 + ... + 12182513.

It is an arithmetic number, because the mean of its divisors is an integer number (853336167048).

Almost surely, 2^{12323565650561} is an apocalyptic number.

12323565650561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12323565650561 is a deficient number, since it is larger than the sum of its proper divisors (1329813022207).

12323565650561 is a wasteful number, since it uses less digits than its factorization.

12323565650561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23308312.

The product of its (nonzero) digits is 4860000, while the sum is 50.

The spelling of 12323565650561 in words is "twelve trillion, three hundred twenty-three billion, five hundred sixty-five million, six hundred fifty thousand, five hundred sixty-one".