206694281689 has 8 divisors (see below), whose sum is σ = 236245429440. Its totient is φ = 177148982256.

The previous prime is 206694281627. The next prime is 206694281699. The reversal of 206694281689 is 986182496602.

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

It is a cyclic number.

It is not a de Polignac number, because 206694281689 - 2¹¹ = 206694279641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206694281699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1386079 + ... + 1527940.

It is an arithmetic number, because the mean of its divisors is an integer number (29530678680).

Almost surely, 2^206694281689 is an apocalyptic number.

It is an amenable number.

206694281689 is a deficient number, since it is larger than the sum of its proper divisors (29551147751).

206694281689 is a wasteful number, since it uses less digits than its factorization.

206694281689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2924159.

The product of its (nonzero) digits is 17915904, while the sum is 61.

The spelling of 206694281689 in words is "two hundred six billion, six hundred ninety-four million, two hundred eighty-one thousand, six hundred eighty-nine".