12138928497 has 12 divisors (see below), whose sum is σ = 17631965520. Its totient is φ = 8047407768.

The previous prime is 12138928493. The next prime is 12138928561. The reversal of 12138928497 is 79482983121.

12138928497 is a `hidden beast` number, since 12 + 138 + 9 + 2 + 8 + 497 = 666.

12138928497 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12138928497 - 2² = 12138928493 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12138928493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3765903 + ... + 3769124.

It is an arithmetic number, because the mean of its divisors is an integer number (1469330460).

Almost surely, 2^12138928497 is an apocalyptic number.

It is an amenable number.

12138928497 is a deficient number, since it is larger than the sum of its proper divisors (5493037023).

12138928497 is a wasteful number, since it uses less digits than its factorization.

12138928497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7535212 (or 7535209 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 54.

The spelling of 12138928497 in words is "twelve billion, one hundred thirty-eight million, nine hundred twenty-eight thousand, four hundred ninety-seven".