16505243113 has 8 divisors (see below), whose sum is σ = 16562318400. Its totient is φ = 16448253360.

The previous prime is 16505243081. The next prime is 16505243119. The reversal of 16505243113 is 31134250561.

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

It is a cyclic number.

It is not a de Polignac number, because 16505243113 - 2⁵ = 16505243081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16505243119) 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, 377988 + ... + 419386.

It is an arithmetic number, because the mean of its divisors is an integer number (2070289800).

Almost surely, 2^16505243113 is an apocalyptic number.

It is an amenable number.

16505243113 is a deficient number, since it is larger than the sum of its proper divisors (57075287).

16505243113 is an equidigital number, since it uses as much as digits as its factorization.

16505243113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42767.

The product of its (nonzero) digits is 10800, while the sum is 31.

Adding to 16505243113 its reverse (31134250561), we get a palindrome (47639493674).

The spelling of 16505243113 in words is "sixteen billion, five hundred five million, two hundred forty-three thousand, one hundred thirteen".