16696783971349 has 2 divisors, whose sum is σ = 16696783971350. Its totient is φ = 16696783971348.

The previous prime is 16696783971319. The next prime is 16696783971379. The reversal of 16696783971349 is 94317938769661.

It is a balanced prime because it is at equal distance from previous prime (16696783971319) and next prime (16696783971379).

It can be written as a sum of positive squares in only one way, i.e., 10272941650449 + 6423842320900 = 3205143^2 + 2534530^2 .

It is a cyclic number.

It is not a de Polignac number, because 16696783971349 - 2¹³ = 16696783963157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16696783971319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8348391985674 + 8348391985675.

It is an arithmetic number, because the mean of its divisors is an integer number (8348391985675).

Almost surely, 2^{16696783971349} is an apocalyptic number.

It is an amenable number.

16696783971349 is a deficient number, since it is larger than the sum of its proper divisors (1).

16696783971349 is an equidigital number, since it uses as much as digits as its factorization.

16696783971349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2222131968, while the sum is 79.

The spelling of 16696783971349 in words is "sixteen trillion, six hundred ninety-six billion, seven hundred eighty-three million, nine hundred seventy-one thousand, three hundred forty-nine".