23543601081 has 96 divisors (see below), whose sum is σ = 44611476480. Its totient is φ = 10695110400.

The previous prime is 23543601073. The next prime is 23543601083. The reversal of 23543601081 is 18010634532.

It is not a de Polignac number, because 23543601081 - 2³ = 23543601073 is a prime.

It is a super-2 number, since 2×23543601081² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23543601083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 725871 + ... + 757611.

It is an arithmetic number, because the mean of its divisors is an integer number (464702880).

Almost surely, 2^23543601081 is an apocalyptic number.

23543601081 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

23543601081 is a deficient number, since it is larger than the sum of its proper divisors (21067875399).

23543601081 is a wasteful number, since it uses less digits than its factorization.

23543601081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31807 (or 31794 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The spelling of 23543601081 in words is "twenty-three billion, five hundred forty-three million, six hundred one thousand, eighty-one".