16639958200406 has 4 divisors (see below), whose sum is σ = 24959937300612. Its totient is φ = 8319979100202.

The previous prime is 16639958200403. The next prime is 16639958200417. The reversal of 16639958200406 is 60400285993661.

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

It is a super-2 number, since 2×16639958200406² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16639958200403) 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 as a sum of consecutive naturals, namely, 4159989550100 + ... + 4159989550103.

It is an arithmetic number, because the mean of its divisors is an integer number (6239984325153).

Almost surely, 2^{16639958200406} is an apocalyptic number.

16639958200406 is a deficient number, since it is larger than the sum of its proper divisors (8319979100206).

16639958200406 is an equidigital number, since it uses as much as digits as its factorization.

16639958200406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8319979100205.

The product of its (nonzero) digits is 16796160, while the sum is 59.

The spelling of 16639958200406 in words is "sixteen trillion, six hundred thirty-nine billion, nine hundred fifty-eight million, two hundred thousand, four hundred six".