12542530388 has 12 divisors (see below), whose sum is σ = 22070697012. Its totient is φ = 6236616960.

The previous prime is 12542530373. The next prime is 12542530397. The reversal of 12542530388 is 88303524521.

It can be written as a sum of positive squares in 2 ways, for example, as 3290399044 + 9252131344 = 57362^2 + 96188^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8661245 + ... + 8662692.

It is an arithmetic number, because the mean of its divisors is an integer number (1839224751).

Almost surely, 2^12542530388 is an apocalyptic number.

It is an amenable number.

12542530388 is a deficient number, since it is larger than the sum of its proper divisors (9528166624).

12542530388 is a wasteful number, since it uses less digits than its factorization.

12542530388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17324122 (or 17324120 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 41.

The spelling of 12542530388 in words is "twelve billion, five hundred forty-two million, five hundred thirty thousand, three hundred eighty-eight".