16115613321 has 4 divisors (see below), whose sum is σ = 21487484432. Its totient is φ = 10743742212.

The previous prime is 16115613313. The next prime is 16115613347. The reversal of 16115613321 is 12331651161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 16115613321 - 2³ = 16115613313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16115613121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2685935551 + ... + 2685935556.

It is an arithmetic number, because the mean of its divisors is an integer number (5371871108).

Almost surely, 2^16115613321 is an apocalyptic number.

It is an amenable number.

16115613321 is a deficient number, since it is larger than the sum of its proper divisors (5371871111).

16115613321 is an equidigital number, since it uses as much as digits as its factorization.

16115613321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5371871110.

The product of its digits is 3240, while the sum is 30.

The spelling of 16115613321 in words is "sixteen billion, one hundred fifteen million, six hundred thirteen thousand, three hundred twenty-one".