205336668889 has 8 divisors (see below), whose sum is σ = 227158620480. Its totient is φ = 184040547600.

The previous prime is 205336668871. The next prime is 205336668907. The reversal of 205336668889 is 988866633502.

It is an interprime number because it is at equal distance from previous prime (205336668871) and next prime (205336668907).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205336668889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 205336668889.

It is not an unprimeable number, because it can be changed into a prime (205336668289) 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, 131456754 + ... + 131458315.

It is an arithmetic number, because the mean of its divisors is an integer number (28394827560).

Almost surely, 2^205336668889 is an apocalyptic number.

It is an amenable number.

205336668889 is a deficient number, since it is larger than the sum of its proper divisors (21821951591).

205336668889 is a wasteful number, since it uses less digits than its factorization.

205336668889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262915151.

The product of its (nonzero) digits is 89579520, while the sum is 64.

It can be divided in two parts, 205336 and 668889, that added together give a square (874225 = 935²).

The spelling of 205336668889 in words is "two hundred five billion, three hundred thirty-six million, six hundred sixty-eight thousand, eight hundred eighty-nine".