13621323015563 has 8 divisors (see below), whose sum is σ = 13629867451200. Its totient is φ = 13612781091328.

The previous prime is 13621323015449. The next prime is 13621323015569. The reversal of 13621323015563 is 36551032312631.

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-13621323015563 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13621323015563.

It is not an unprimeable number, because it can be changed into a prime (13621323015569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10282493 + ... + 11531361.

It is an arithmetic number, because the mean of its divisors is an integer number (1703733431400).

Almost surely, 2^{13621323015563} is an apocalyptic number.

13621323015563 is a deficient number, since it is larger than the sum of its proper divisors (8544435637).

13621323015563 is a wasteful number, since it uses less digits than its factorization.

13621323015563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1255701.

The product of its (nonzero) digits is 291600, while the sum is 41.

The spelling of 13621323015563 in words is "thirteen trillion, six hundred twenty-one billion, three hundred twenty-three million, fifteen thousand, five hundred sixty-three".