12800552538 has 32 divisors (see below), whose sum is σ = 25840425600. Its totient is φ = 4227001856.

The previous prime is 12800552459. The next prime is 12800552539. The reversal of 12800552538 is 83525500821.

It is a junction number, because it is equal to n+sod(n) for n = 12800552496 and 12800552505.

It is not an unprimeable number, because it can be changed into a prime (12800552539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2009803 + ... + 2016161.

It is an arithmetic number, because the mean of its divisors is an integer number (807513300).

Almost surely, 2^12800552538 is an apocalyptic number.

12800552538 is an abundant number, since it is smaller than the sum of its proper divisors (13039873062).

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

12800552538 is a wasteful number, since it uses less digits than its factorization.

12800552538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9446.

The product of its (nonzero) digits is 96000, while the sum is 39.

The spelling of 12800552538 in words is "twelve billion, eight hundred million, five hundred fifty-two thousand, five hundred thirty-eight".