206689592357 has 4 divisors (see below), whose sum is σ = 207220928460. Its totient is φ = 206158256256.

The previous prime is 206689592341. The next prime is 206689592359. The reversal of 206689592357 is 753295986602.

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

It can be written as a sum of positive squares in 2 ways, for example, as 118010112676 + 88679479681 = 343526^2 + 297791^2 .

It is a cyclic number.

It is not a de Polignac number, because 206689592357 - 2⁴ = 206689592341 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 206689592357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206689592359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265667468 + ... + 265668245.

It is an arithmetic number, because the mean of its divisors is an integer number (51805232115).

Almost surely, 2^206689592357 is an apocalyptic number.

It is an amenable number.

206689592357 is a deficient number, since it is larger than the sum of its proper divisors (531336103).

206689592357 is an equidigital number, since it uses as much as digits as its factorization.

206689592357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531336102.

The product of its (nonzero) digits is 48988800, while the sum is 62.

The spelling of 206689592357 in words is "two hundred six billion, six hundred eighty-nine million, five hundred ninety-two thousand, three hundred fifty-seven".