9998161708351 has 2 divisors, whose sum is σ = 9998161708352. Its totient is φ = 9998161708350.

The previous prime is 9998161708277. The next prime is 9998161708397. The reversal of 9998161708351 is 1538071618999.

It is a strong prime.

It is an emirp because it is prime and its reverse (1538071618999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9998161708351 - 2²³ = 9998153319743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9998161708651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999080854175 + 4999080854176.

It is an arithmetic number, because the mean of its divisors is an integer number (4999080854176).

Almost surely, 2^{9998161708351} is an apocalyptic number.

9998161708351 is a deficient number, since it is larger than the sum of its proper divisors (1).

9998161708351 is an equidigital number, since it uses as much as digits as its factorization.

9998161708351 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29393280, while the sum is 67.

The spelling of 9998161708351 in words is "nine trillion, nine hundred ninety-eight billion, one hundred sixty-one million, seven hundred eight thousand, three hundred fifty-one".