213716788805 has 16 divisors (see below), whose sum is σ = 282924142704. Its totient is φ = 153972318720.

The previous prime is 213716788801. The next prime is 213716788823. The reversal of 213716788805 is 508887617312.

It can be written as a sum of positive squares in 8 ways, for example, as 24521367649 + 189195421156 = 156593^2 + 434966^2 .

It is not a de Polignac number, because 213716788805 - 2² = 213716788801 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213716788801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40094294 + ... + 40099623.

It is an arithmetic number, because the mean of its divisors is an integer number (17682758919).

Almost surely, 2^213716788805 is an apocalyptic number.

It is an amenable number.

213716788805 is a deficient number, since it is larger than the sum of its proper divisors (69207353899).

213716788805 is a wasteful number, since it uses less digits than its factorization.

213716788805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80193976.

The product of its (nonzero) digits is 4515840, while the sum is 56.

The spelling of 213716788805 in words is "two hundred thirteen billion, seven hundred sixteen million, seven hundred eighty-eight thousand, eight hundred five".