16356542220651 has 16 divisors (see below), whose sum is σ = 21997927404288. Its totient is φ = 10809931423200.

The previous prime is 16356542220643. The next prime is 16356542220661. The reversal of 16356542220651 is 15602224565361.

It is not a de Polignac number, because 16356542220651 - 2³ = 16356542220643 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16356542220651.

It is not an unprimeable number, because it can be changed into a prime (16356542220661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21139980 + ... + 21900041.

It is an arithmetic number, because the mean of its divisors is an integer number (1374870462768).

Almost surely, 2^{16356542220651} is an apocalyptic number.

16356542220651 is a deficient number, since it is larger than the sum of its proper divisors (5641385183637).

16356542220651 is a wasteful number, since it uses less digits than its factorization.

16356542220651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43041122.

The product of its (nonzero) digits is 2592000, while the sum is 48.

The spelling of 16356542220651 in words is "sixteen trillion, three hundred fifty-six billion, five hundred forty-two million, two hundred twenty thousand, six hundred fifty-one".