16231655816 has 8 divisors (see below), whose sum is σ = 30434354670. Its totient is φ = 8115827904.

The previous prime is 16231655809. The next prime is 16231655819. The reversal of 16231655816 is 61855613261.

It can be written as a sum of positive squares in only one way, i.e., 14745244900 + 1486410916 = 121430^2 + 38554^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (16231655819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1014478481 + ... + 1014478496.

Almost surely, 2^16231655816 is an apocalyptic number.

It is an amenable number.

16231655816 is a deficient number, since it is larger than the sum of its proper divisors (14202698854).

16231655816 is a wasteful number, since it uses less digits than its factorization.

16231655816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2028956983 (or 2028956979 counting only the distinct ones).

The product of its digits is 259200, while the sum is 44.

The spelling of 16231655816 in words is "sixteen billion, two hundred thirty-one million, six hundred fifty-five thousand, eight hundred sixteen".