16556510005099 has 4 divisors (see below), whose sum is σ = 16599738491136. Its totient is φ = 16513281519064.

The previous prime is 16556510005081. The next prime is 16556510005109. The reversal of 16556510005099 is 99050001565561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16556510005099 - 2¹³ = 16556509996907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16556510005019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21614242444 + ... + 21614243209.

It is an arithmetic number, because the mean of its divisors is an integer number (4149934622784).

Almost surely, 2^{16556510005099} is an apocalyptic number.

16556510005099 is a deficient number, since it is larger than the sum of its proper divisors (43228486037).

16556510005099 is an equidigital number, since it uses as much as digits as its factorization.

16556510005099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43228486036.

The product of its (nonzero) digits is 1822500, while the sum is 52.

The spelling of 16556510005099 in words is "sixteen trillion, five hundred fifty-six billion, five hundred ten million, five thousand, ninety-nine".