13641601521671 has 4 divisors (see below), whose sum is σ = 13690849180872. Its totient is φ = 13592353862472.

The previous prime is 13641601521631. The next prime is 13641601521787. The reversal of 13641601521671 is 17612510614631.

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 13641601521671 - 2¹⁸ = 13641601259527 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 (13641601521631) 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 3 ways as a sum of consecutive naturals, for example, 24623829185 + ... + 24623829738.

It is an arithmetic number, because the mean of its divisors is an integer number (3422712295218).

Almost surely, 2^{13641601521671} is an apocalyptic number.

13641601521671 is a deficient number, since it is larger than the sum of its proper divisors (49247659201).

13641601521671 is an equidigital number, since it uses as much as digits as its factorization.

13641601521671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49247659200.

The product of its (nonzero) digits is 181440, while the sum is 44.

The spelling of 13641601521671 in words is "thirteen trillion, six hundred forty-one billion, six hundred one million, five hundred twenty-one thousand, six hundred seventy-one".