16044658687 has 4 divisors (see below), whose sum is σ = 16081713760. Its totient is φ = 16007603616.

The previous prime is 16044658649. The next prime is 16044658709. The reversal of 16044658687 is 78685644061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78685644061 = 197 ⋅399419513.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16044658687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16044658187) 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 3 ways as a sum of consecutive naturals, for example, 18526887 + ... + 18527752.

It is an arithmetic number, because the mean of its divisors is an integer number (4020428440).

Almost surely, 2^16044658687 is an apocalyptic number.

16044658687 is a deficient number, since it is larger than the sum of its proper divisors (37055073).

16044658687 is an equidigital number, since it uses as much as digits as its factorization.

16044658687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37055072.

The product of its (nonzero) digits is 7741440, while the sum is 55.

The spelling of 16044658687 in words is "sixteen billion, forty-four million, six hundred fifty-eight thousand, six hundred eighty-seven".