2659641368173 has 4 divisors (see below), whose sum is σ = 2659757527548. Its totient is φ = 2659525208800.

The previous prime is 2659641368119. The next prime is 2659641368203. The reversal of 2659641368173 is 3718631469562.

It is a happy number.

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 2635434053604 + 24207314569 = 1623402^2 + 155587^2 .

It is a cyclic number.

It is not a de Polignac number, because 2659641368173 - 2²⁵ = 2659607813741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2659641362173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58045336 + ... + 58091137.

It is an arithmetic number, because the mean of its divisors is an integer number (664939381887).

Almost surely, 2^{2659641368173} is an apocalyptic number.

It is an amenable number.

2659641368173 is a deficient number, since it is larger than the sum of its proper divisors (116159375).

2659641368173 is a wasteful number, since it uses less digits than its factorization.

2659641368173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116159374.

The product of its digits is 39191040, while the sum is 61.

The spelling of 2659641368173 in words is "two trillion, six hundred fifty-nine billion, six hundred forty-one million, three hundred sixty-eight thousand, one hundred seventy-three".