23161852512 has 144 divisors (see below), whose sum is σ = 68288835888. Its totient is φ = 7441244160.

The previous prime is 23161852451. The next prime is 23161852513. The reversal of 23161852512 is 21525816132.

23161852512 is a `hidden beast` number, since 2 + 3 + 1 + 61 + 85 + 2 + 512 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23161852513) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 968248 + ... + 991880.

It is an arithmetic number, because the mean of its divisors is an integer number (474228027).

Almost surely, 2^23161852512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23161852512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34144417944).

23161852512 is an abundant number, since it is smaller than the sum of its proper divisors (45126983376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23161852512 is a wasteful number, since it uses less digits than its factorization.

23161852512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23773 (or 23762 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The spelling of 23161852512 in words is "twenty-three billion, one hundred sixty-one million, eight hundred fifty-two thousand, five hundred twelve".