16521356356 has 12 divisors (see below), whose sum is σ = 29103847360. Its totient is φ = 8205971400.

The previous prime is 16521356339. The next prime is 16521356407. The reversal of 16521356356 is 65365312561.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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, 13676016 + ... + 13677223.

Almost surely, 2^16521356356 is an apocalyptic number.

It is an amenable number.

16521356356 is a deficient number, since it is larger than the sum of its proper divisors (12582491004).

16521356356 is a wasteful number, since it uses less digits than its factorization.

16521356356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27353394 (or 27353392 counting only the distinct ones).

The product of its digits is 486000, while the sum is 43.

The spelling of 16521356356 in words is "sixteen billion, five hundred twenty-one million, three hundred fifty-six thousand, three hundred fifty-six".