13178554788671 has 4 divisors (see below), whose sum is σ = 13192383283632. Its totient is φ = 13164726293712.

The previous prime is 13178554788661. The next prime is 13178554788697. The reversal of 13178554788671 is 17688745587131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13178554788671 - 2¹⁰ = 13178554787647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13178554788595 and 13178554788604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13178554788661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6914246051 + ... + 6914247956.

It is an arithmetic number, because the mean of its divisors is an integer number (3298095820908).

Almost surely, 2^{13178554788671} is an apocalyptic number.

13178554788671 is a deficient number, since it is larger than the sum of its proper divisors (13828494961).

13178554788671 is an equidigital number, since it uses as much as digits as its factorization.

13178554788671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13828494960.

The product of its digits is 316108800, while the sum is 71.

The spelling of 13178554788671 in words is "thirteen trillion, one hundred seventy-eight billion, five hundred fifty-four million, seven hundred eighty-eight thousand, six hundred seventy-one".