9681360257 has 2 divisors, whose sum is σ = 9681360258. Its totient is φ = 9681360256.

The previous prime is 9681360197. The next prime is 9681360289. The reversal of 9681360257 is 7520631869.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9625768321 + 55591936 = 98111^2 + 7456^2 .

It is a cyclic number.

It is not a de Polignac number, because 9681360257 - 2¹² = 9681356161 is a prime.

It is not a weakly prime, because it can be changed into another prime (9681360457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4840680128 + 4840680129.

It is an arithmetic number, because the mean of its divisors is an integer number (4840680129).

Almost surely, 2^9681360257 is an apocalyptic number.

It is an amenable number.

9681360257 is a deficient number, since it is larger than the sum of its proper divisors (1).

9681360257 is an equidigital number, since it uses as much as digits as its factorization.

9681360257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 47.

The square root of 9681360257 is about 98393.9035560639. The cubic root of 9681360257 is about 2131.3042961924.

The spelling of 9681360257 in words is "nine billion, six hundred eighty-one million, three hundred sixty thousand, two hundred fifty-seven".