16651511516 has 24 divisors (see below), whose sum is σ = 29414689920. Its totient is φ = 8247669872.

The previous prime is 16651511473. The next prime is 16651511519. The reversal of 16651511516 is 61511515661.

It is a happy number.

16651511516 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 16651511516.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16651511519) 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 7 ways as a sum of consecutive naturals, for example, 144095 + ... + 232521.

It is an arithmetic number, because the mean of its divisors is an integer number (1225612080).

Almost surely, 2^16651511516 is an apocalyptic number.

It is an amenable number.

16651511516 is a deficient number, since it is larger than the sum of its proper divisors (12763178404).

16651511516 is a wasteful number, since it uses less digits than its factorization.

16651511516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88873 (or 88871 counting only the distinct ones).

The product of its digits is 27000, while the sum is 38.

The spelling of 16651511516 in words is "sixteen billion, six hundred fifty-one million, five hundred eleven thousand, five hundred sixteen".