16663504321135 has 8 divisors (see below), whose sum is σ = 22852805926176. Its totient is φ = 11426402963040.

The previous prime is 16663504321127. The next prime is 16663504321151. The reversal of 16663504321135 is 53112340536661.

It is a happy number.

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

It is not a de Polignac number, because 16663504321135 - 2³ = 16663504321127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 238050061696 + ... + 238050061765.

It is an arithmetic number, because the mean of its divisors is an integer number (2856600740772).

Almost surely, 2^{16663504321135} is an apocalyptic number.

16663504321135 is a deficient number, since it is larger than the sum of its proper divisors (6189301605041).

16663504321135 is an equidigital number, since it uses as much as digits as its factorization.

16663504321135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476100123473.

The product of its (nonzero) digits is 1166400, while the sum is 46.

Adding to 16663504321135 its reverse (53112340536661), we get a palindrome (69775844857796).

The spelling of 16663504321135 in words is "sixteen trillion, six hundred sixty-three billion, five hundred four million, three hundred twenty-one thousand, one hundred thirty-five".