12538787639 has 8 divisors (see below), whose sum is σ = 14334097920. Its totient is φ = 10744491096.

The previous prime is 12538787633. The next prime is 12538787671. The reversal of 12538787639 is 93678783521.

It is a happy number.

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 12538787639 - 2⁸ = 12538787383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12538787633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226739 + ... + 276564.

It is an arithmetic number, because the mean of its divisors is an integer number (1791762240).

Almost surely, 2^12538787639 is an apocalyptic number.

12538787639 is a deficient number, since it is larger than the sum of its proper divisors (1795310281).

12538787639 is an equidigital number, since it uses as much as digits as its factorization.

12538787639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506869.

The product of its digits is 15240960, while the sum is 59.

The spelling of 12538787639 in words is "twelve billion, five hundred thirty-eight million, seven hundred eighty-seven thousand, six hundred thirty-nine".