206438224857686 has 8 divisors (see below), whose sum is σ = 309657720491064. Its totient is φ = 103218984694000.

The previous prime is 206438224857677. The next prime is 206438224857713. The reversal of 206438224857686 is 686758422834602.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61834295 + ... + 65087298.

It is an arithmetic number, because the mean of its divisors is an integer number (38707215061383).

Almost surely, 2^{206438224857686} is an apocalyptic number.

206438224857686 is a deficient number, since it is larger than the sum of its proper divisors (103219495633378).

206438224857686 is a wasteful number, since it uses less digits than its factorization.

206438224857686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127734846.

The product of its (nonzero) digits is 1486356480, while the sum is 71.

The spelling of 206438224857686 in words is "two hundred six trillion, four hundred thirty-eight billion, two hundred twenty-four million, eight hundred fifty-seven thousand, six hundred eighty-six".