206349785889 has 8 divisors (see below), whose sum is σ = 296297128512. Its totient is φ = 126984483600.

The previous prime is 206349785881. The next prime is 206349785891. The reversal of 206349785889 is 988587943602.

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

It is not a de Polignac number, because 206349785889 - 2³ = 206349785881 is a prime.

It is a super-2 number, since 2×206349785889² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (206349785881) 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, 2645510037 + ... + 2645510114.

It is an arithmetic number, because the mean of its divisors is an integer number (37037141064).

Almost surely, 2^206349785889 is an apocalyptic number.

It is an amenable number.

206349785889 is a deficient number, since it is larger than the sum of its proper divisors (89947342623).

206349785889 is a wasteful number, since it uses less digits than its factorization.

206349785889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5291020167.

The product of its (nonzero) digits is 209018880, while the sum is 69.

The spelling of 206349785889 in words is "two hundred six billion, three hundred forty-nine million, seven hundred eighty-five thousand, eight hundred eighty-nine".