23238640207872 has 144 divisors (see below), whose sum is σ = 67126049974620. Its totient is φ = 7745221951488.

The previous prime is 23238640207859. The next prime is 23238640207897. The reversal of 23238640207872 is 27870204683232.

23238640207872 is a `hidden beast` number, since 2 + 3 + 23 + 86 + 402 + 0 + 78 + 72 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 22434849063936 + 803791143936 = 4736544^2 + 896544^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 151674088 + ... + 151827224.

Almost surely, 2^{23238640207872} 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 23238640207872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33563024987310).

23238640207872 is an abundant number, since it is smaller than the sum of its proper divisors (43887409766748).

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

23238640207872 is a wasteful number, since it uses less digits than its factorization.

23238640207872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161398 (or 161375 counting only the distinct ones).

The product of its (nonzero) digits is 10838016, while the sum is 54.

The spelling of 23238640207872 in words is "twenty-three trillion, two hundred thirty-eight billion, six hundred forty million, two hundred seven thousand, eight hundred seventy-two".