16645651115 has 4 divisors (see below), whose sum is σ = 19974781344. Its totient is φ = 13316520888.

The previous prime is 16645651091. The next prime is 16645651163. The reversal of 16645651115 is 51115654661.

It is a happy number.

16645651115 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51115654661 = 839 ⋅60924499.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16645651115 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1664565107 + ... + 1664565116.

It is an arithmetic number, because the mean of its divisors is an integer number (4993695336).

Almost surely, 2^16645651115 is an apocalyptic number.

16645651115 is a deficient number, since it is larger than the sum of its proper divisors (3329130229).

16645651115 is an equidigital number, since it uses as much as digits as its factorization.

16645651115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3329130228.

The product of its digits is 108000, while the sum is 41.

The spelling of 16645651115 in words is "sixteen billion, six hundred forty-five million, six hundred fifty-one thousand, one hundred fifteen".