13621271663 has 8 divisors (see below), whose sum is σ = 13745733936. Its totient is φ = 13497120000.

The previous prime is 13621271633. The next prime is 13621271683. The reversal of 13621271663 is 36617212631.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13621271663 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 (13621271633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10913 + ... + 165413.

It is an arithmetic number, because the mean of its divisors is an integer number (1718216742).

Almost surely, 2^13621271663 is an apocalyptic number.

13621271663 is a deficient number, since it is larger than the sum of its proper divisors (124462273).

13621271663 is a wasteful number, since it uses less digits than its factorization.

13621271663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155305.

The product of its digits is 54432, while the sum is 38.

The spelling of 13621271663 in words is "thirteen billion, six hundred twenty-one million, two hundred seventy-one thousand, six hundred sixty-three".