16522621816 has 16 divisors (see below), whose sum is σ = 31735524240. Its totient is φ = 8059815360.

The previous prime is 16522621813. The next prime is 16522621853. The reversal of 16522621816 is 61812622561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16522621811) 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 in 3 ways as a sum of consecutive naturals, for example, 25186596 + ... + 25187251.

It is an arithmetic number, because the mean of its divisors is an integer number (1983470265).

Almost surely, 2^16522621816 is an apocalyptic number.

It is an amenable number.

16522621816 is a deficient number, since it is larger than the sum of its proper divisors (15212902424).

16522621816 is a wasteful number, since it uses less digits than its factorization.

16522621816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50373894 (or 50373890 counting only the distinct ones).

The product of its digits is 69120, while the sum is 40.

The spelling of 16522621816 in words is "sixteen billion, five hundred twenty-two million, six hundred twenty-one thousand, eight hundred sixteen".