23543663121 has 64 divisors (see below), whose sum is σ = 39748423680. Its totient is φ = 13633488000.

The previous prime is 23543663063. The next prime is 23543663131. The reversal of 23543663121 is 12136634532.

23543663121 is a `hidden beast` number, since 2 + 3 + 543 + 66 + 31 + 21 = 666.

It is not a de Polignac number, because 23543663121 - 2⁷ = 23543662993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23543663131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10320501 + ... + 10322781.

It is an arithmetic number, because the mean of its divisors is an integer number (621069120).

Almost surely, 2^23543663121 is an apocalyptic number.

It is an amenable number.

23543663121 is a deficient number, since it is larger than the sum of its proper divisors (16204760559).

23543663121 is a wasteful number, since it uses less digits than its factorization.

23543663121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3835 (or 3829 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The spelling of 23543663121 in words is "twenty-three billion, five hundred forty-three million, six hundred sixty-three thousand, one hundred twenty-one".