9713851565 has 12 divisors (see below), whose sum is σ = 12812651292. Its totient is φ = 7064618880.

The previous prime is 9713851531. The next prime is 9713851591. The reversal of 9713851565 is 5651583179.

It can be written as a sum of positive squares in 2 ways, for example, as 2166064681 + 7547786884 = 46541^2 + 86878^2 .

It is not a de Polignac number, because 9713851565 - 2²⁸ = 9445416109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8027372 + ... + 8028581.

It is an arithmetic number, because the mean of its divisors is an integer number (1067720941).

Almost surely, 2^9713851565 is an apocalyptic number.

It is an amenable number.

9713851565 is a deficient number, since it is larger than the sum of its proper divisors (3098799727).

9713851565 is a wasteful number, since it uses less digits than its factorization.

9713851565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16055980 (or 16055969 counting only the distinct ones).

The product of its digits is 1134000, while the sum is 50.

The square root of 9713851565 is about 98558.8735984741. The cubic root of 9713851565 is about 2133.6859016222.

The spelling of 9713851565 in words is "nine billion, seven hundred thirteen million, eight hundred fifty-one thousand, five hundred sixty-five".