23939517587128 has 128 divisors (see below), whose sum is σ = 54186324433920. Its totient is φ = 9770523471360.

The previous prime is 23939517587039. The next prime is 23939517587143. The reversal of 23939517587128 is 82178571593932.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7398426 + ... + 10129942.

It is an arithmetic number, because the mean of its divisors is an integer number (423330659640).

Almost surely, 2^{23939517587128} 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 23939517587128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27093162216960).

23939517587128 is an abundant number, since it is smaller than the sum of its proper divisors (30246806846792).

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

23939517587128 is a wasteful number, since it uses less digits than its factorization.

23939517587128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2731757 (or 2731753 counting only the distinct ones).

The product of its digits is 228614400, while the sum is 70.

The spelling of 23939517587128 in words is "twenty-three trillion, nine hundred thirty-nine billion, five hundred seventeen million, five hundred eighty-seven thousand, one hundred twenty-eight".