12538231552 has 72 divisors (see below), whose sum is σ = 31203148032. Its totient is φ = 4885017600.

The previous prime is 12538231549. The next prime is 12538231553. The reversal of 12538231552 is 25513283521.

It is not an unprimeable number, because it can be changed into a prime (12538231553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 298324 + ... + 337747.

It is an arithmetic number, because the mean of its divisors is an integer number (433377056).

Almost surely, 2^12538231552 is an apocalyptic number.

It is an amenable number.

12538231552 is an abundant number, since it is smaller than the sum of its proper divisors (18664916480).

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

12538231552 is an equidigital number, since it uses as much as digits as its factorization.

12538231552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636105 (or 636091 counting only the distinct ones).

The product of its digits is 72000, while the sum is 37.

The spelling of 12538231552 in words is "twelve billion, five hundred thirty-eight million, two hundred thirty-one thousand, five hundred fifty-two".