9896351861729 has 2 divisors, whose sum is σ = 9896351861730. Its totient is φ = 9896351861728.

The previous prime is 9896351861657. The next prime is 9896351861777. The reversal of 9896351861729 is 9271681536989.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9603398134225 + 292953727504 = 3098935^2 + 541252^2 .

It is a cyclic number.

It is not a de Polignac number, because 9896351861729 - 2²⁴ = 9896335084513 is a prime.

It is a super-2 number, since 2×9896351861729² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (9896351861129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4948175930864 + 4948175930865.

It is an arithmetic number, because the mean of its divisors is an integer number (4948175930865).

Almost surely, 2^{9896351861729} is an apocalyptic number.

It is an amenable number.

9896351861729 is a deficient number, since it is larger than the sum of its proper divisors (1).

9896351861729 is an equidigital number, since it uses as much as digits as its factorization.

9896351861729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 352719360, while the sum is 74.

The spelling of 9896351861729 in words is "nine trillion, eight hundred ninety-six billion, three hundred fifty-one million, eight hundred sixty-one thousand, seven hundred twenty-nine".