16794687906449 has 2 divisors, whose sum is σ = 16794687906450. Its totient is φ = 16794687906448.

The previous prime is 16794687906413. The next prime is 16794687906509. The reversal of 16794687906449 is 94460978649761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13149616537600 + 3645071368849 = 3626240^2 + 1909207^2 .

It is a cyclic number.

It is not a de Polignac number, because 16794687906449 - 2⁸ = 16794687906193 is a prime.

It is not a weakly prime, because it can be changed into another prime (16794687906049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8397343953224 + 8397343953225.

It is an arithmetic number, because the mean of its divisors is an integer number (8397343953225).

Almost surely, 2^{16794687906449} is an apocalyptic number.

It is an amenable number.

16794687906449 is a deficient number, since it is larger than the sum of its proper divisors (1).

16794687906449 is an equidigital number, since it uses as much as digits as its factorization.

16794687906449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3950456832, while the sum is 80.

The spelling of 16794687906449 in words is "sixteen trillion, seven hundred ninety-four billion, six hundred eighty-seven million, nine hundred six thousand, four hundred forty-nine".