16556242105009 has 12 divisors (see below), whose sum is σ = 17364550889488. Its totient is φ = 15776793315360.

The previous prime is 16556242104971. The next prime is 16556242105019. The reversal of 16556242105009 is 90050124265561.

It is not a de Polignac number, because 16556242105009 - 2¹³ = 16556242096817 is a prime.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16556242105009.

It is not an unprimeable number, because it can be changed into a prime (16556242105019) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 114451479 + ... + 114596044.

Almost surely, 2^{16556242105009} is an apocalyptic number.

It is an amenable number.

16556242105009 is a deficient number, since it is larger than the sum of its proper divisors (808308784479).

16556242105009 is an equidigital number, since it uses as much as digits as its factorization.

16556242105009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229047648 (or 229047607 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 46.

The spelling of 16556242105009 in words is "sixteen trillion, five hundred fifty-six billion, two hundred forty-two million, one hundred five thousand, nine".