16968159997 has 2 divisors, whose sum is σ = 16968159998. Its totient is φ = 16968159996.

The previous prime is 16968159979. The next prime is 16968160051. The reversal of 16968159997 is 79995186961.

It is a happy number.

Together with previous prime (16968159979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8610726436 + 8357433561 = 92794^2 + 91419^2 .

It is a cyclic number.

It is not a de Polignac number, because 16968159997 - 2¹⁹ = 16967635709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16968159497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8484079998 + 8484079999.

It is an arithmetic number, because the mean of its divisors is an integer number (8484079999).

Almost surely, 2^16968159997 is an apocalyptic number.

It is an amenable number.

16968159997 is a deficient number, since it is larger than the sum of its proper divisors (1).

16968159997 is an equidigital number, since it uses as much as digits as its factorization.

16968159997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 66134880, while the sum is 70.

The spelling of 16968159997 in words is "sixteen billion, nine hundred sixty-eight million, one hundred fifty-nine thousand, nine hundred ninety-seven".