16557616648 has 16 divisors (see below), whose sum is σ = 32395337280. Its totient is φ = 7918860048.

The previous prime is 16557616643. The next prime is 16557616651. The reversal of 16557616648 is 84661675561.

16557616648 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (16557616643) by changing a digit.

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, 44993340 + ... + 44993707.

It is an arithmetic number, because the mean of its divisors is an integer number (2024708580).

Almost surely, 2^16557616648 is an apocalyptic number.

It is an amenable number.

16557616648 is a deficient number, since it is larger than the sum of its proper divisors (15837720632).

16557616648 is a wasteful number, since it uses less digits than its factorization.

16557616648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89987076 (or 89987072 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 55.

The spelling of 16557616648 in words is "sixteen billion, five hundred fifty-seven million, six hundred sixteen thousand, six hundred forty-eight".