3205605641989 has 8 divisors (see below), whose sum is σ = 3239999216640. Its totient is φ = 3171355076736.

The previous prime is 3205605641977. The next prime is 3205605642047. The reversal of 3205605641989 is 9891465065023.

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 3205605641989 - 2²¹ = 3205603544837 is a prime.

It is a super-2 number, since 2×3205605641989² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3205605648989) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 35707279 + ... + 35796940.

It is an arithmetic number, because the mean of its divisors is an integer number (404999902080).

Almost surely, 2^{3205605641989} is an apocalyptic number.

It is an amenable number.

3205605641989 is a deficient number, since it is larger than the sum of its proper divisors (34393574651).

3205605641989 is a wasteful number, since it uses less digits than its factorization.

3205605641989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71504699.

The product of its (nonzero) digits is 13996800, while the sum is 58.

The spelling of 3205605641989 in words is "three trillion, two hundred five billion, six hundred five million, six hundred forty-one thousand, nine hundred eighty-nine".