12538315493 has 8 divisors (see below), whose sum is σ = 14011776576. Its totient is φ = 11120456800.

The previous prime is 12538315483. The next prime is 12538315499. The reversal of 12538315493 is 39451383521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12538315493 - 2⁴ = 12538315477 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12538315499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13900121 + ... + 13901022.

It is an arithmetic number, because the mean of its divisors is an integer number (1751472072).

Almost surely, 2^12538315493 is an apocalyptic number.

It is an amenable number.

12538315493 is a deficient number, since it is larger than the sum of its proper divisors (1473461083).

12538315493 is a wasteful number, since it uses less digits than its factorization.

12538315493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27801195.

The product of its digits is 388800, while the sum is 44.

The spelling of 12538315493 in words is "twelve billion, five hundred thirty-eight million, three hundred fifteen thousand, four hundred ninety-three".