9717723855005 has 4 divisors (see below), whose sum is σ = 11661268626012. Its totient is φ = 7774179084000.

The previous prime is 9717723854941. The next prime is 9717723855109. The reversal of 9717723855005 is 5005583277179.

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 3150461702116 + 6567262152889 = 1774954^2 + 2562667^2 .

It is not a de Polignac number, because 9717723855005 - 2⁶ = 9717723854941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 971772385496 + ... + 971772385505.

It is an arithmetic number, because the mean of its divisors is an integer number (2915317156503).

Almost surely, 2^{9717723855005} is an apocalyptic number.

It is an amenable number.

9717723855005 is a deficient number, since it is larger than the sum of its proper divisors (1943544771007).

9717723855005 is a wasteful number, since it uses less digits than its factorization.

9717723855005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1943544771006.

The product of its (nonzero) digits is 18522000, while the sum is 59.

The spelling of 9717723855005 in words is "nine trillion, seven hundred seventeen billion, seven hundred twenty-three million, eight hundred fifty-five thousand, five".