2168400206 has 8 divisors (see below), whose sum is σ = 3717257520. Its totient is φ = 929314368.

The previous prime is 2168400197. The next prime is 2168400217. The reversal of 2168400206 is 6020048612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77442851 + ... + 77442878.

It is an arithmetic number, because the mean of its divisors is an integer number (464657190).

Almost surely, 2^2168400206 is an apocalyptic number.

2168400206 is a deficient number, since it is larger than the sum of its proper divisors (1548857314).

2168400206 is a wasteful number, since it uses less digits than its factorization.

2168400206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154885738.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 2168400206 is about 46566.0842888899. The cubic root of 2168400206 is about 1294.3343589465.

Adding to 2168400206 its reverse (6020048612), we get a palindrome (8188448818).

The spelling of 2168400206 in words is "two billion, one hundred sixty-eight million, four hundred thousand, two hundred six".