13748681979679 has 2 divisors, whose sum is σ = 13748681979680. Its totient is φ = 13748681979678.

The previous prime is 13748681979677. The next prime is 13748681979691. The reversal of 13748681979679 is 97697918684731.

It is a happy number.

13748681979679 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13748681979679 - 2¹ = 13748681979677 is a prime.

Together with 13748681979677, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 13748681979596 and 13748681979605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13748681979671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6874340989839 + 6874340989840.

It is an arithmetic number, because the mean of its divisors is an integer number (6874340989840).

Almost surely, 2^{13748681979679} is an apocalyptic number.

13748681979679 is a deficient number, since it is larger than the sum of its proper divisors (1).

13748681979679 is an equidigital number, since it uses as much as digits as its factorization.

13748681979679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6913299456, while the sum is 85.

The spelling of 13748681979679 in words is "thirteen trillion, seven hundred forty-eight billion, six hundred eighty-one million, nine hundred seventy-nine thousand, six hundred seventy-nine".