16531323016 has 32 divisors (see below), whose sum is σ = 33387139800. Its totient is φ = 7628336640.

The previous prime is 16531323013. The next prime is 16531323031. The reversal of 16531323016 is 61032313561.

It can be written as a sum of positive squares in 4 ways, for example, as 14484122500 + 2047200516 = 120350^2 + 45246^2 .

It is not an unprimeable number, because it can be changed into a prime (16531323013) 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 7 ways as a sum of consecutive naturals, for example, 649050 + ... + 674038.

Almost surely, 2^16531323016 is an apocalyptic number.

It is an amenable number.

16531323016 is an abundant number, since it is smaller than the sum of its proper divisors (16855816784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16531323016 is a wasteful number, since it uses less digits than its factorization.

16531323016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31369 (or 31365 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 31.

Adding to 16531323016 its reverse (61032313561), we get a palindrome (77563636577).

The spelling of 16531323016 in words is "sixteen billion, five hundred thirty-one million, three hundred twenty-three thousand, sixteen".