13139678481 has 8 divisors (see below), whose sum is σ = 17680301760. Its totient is φ = 8679420432.

The previous prime is 13139678477. The next prime is 13139678521. The reversal of 13139678481 is 18487693131.

It is a happy number.

13139678481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 13139678481 - 2² = 13139678477 is a prime.

It is a super-2 number, since 2×13139678481² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13139678381) 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 7 ways as a sum of consecutive naturals, for example, 20090925 + ... + 20091578.

It is an arithmetic number, because the mean of its divisors is an integer number (2210037720).

Almost surely, 2^13139678481 is an apocalyptic number.

It is an amenable number.

13139678481 is a deficient number, since it is larger than the sum of its proper divisors (4540623279).

13139678481 is a wasteful number, since it uses less digits than its factorization.

13139678481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40182615.

The product of its digits is 870912, while the sum is 51.

The spelling of 13139678481 in words is "thirteen billion, one hundred thirty-nine million, six hundred seventy-eight thousand, four hundred eighty-one".