16908680231393 has 2 divisors, whose sum is σ = 16908680231394. Its totient is φ = 16908680231392.

The previous prime is 16908680231299. The next prime is 16908680231413. The reversal of 16908680231393 is 39313208680961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12703322045584 + 4205358185809 = 3564172^2 + 2050697^2 .

It is a cyclic number.

It is not a de Polignac number, because 16908680231393 - 2¹⁰ = 16908680230369 is a prime.

It is not a weakly prime, because it can be changed into another prime (16908680231293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8454340115696 + 8454340115697.

It is an arithmetic number, because the mean of its divisors is an integer number (8454340115697).

Almost surely, 2^{16908680231393} is an apocalyptic number.

It is an amenable number.

16908680231393 is a deficient number, since it is larger than the sum of its proper divisors (1).

16908680231393 is an equidigital number, since it uses as much as digits as its factorization.

16908680231393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10077696, while the sum is 59.

The spelling of 16908680231393 in words is "sixteen trillion, nine hundred eight billion, six hundred eighty million, two hundred thirty-one thousand, three hundred ninety-three".