16969884780257 has 2 divisors, whose sum is σ = 16969884780258. Its totient is φ = 16969884780256.

The previous prime is 16969884780221. The next prime is 16969884780307. The reversal of 16969884780257 is 75208748896961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14674293135616 + 2295591644641 = 3830704^2 + 1515121^2 .

It is a cyclic number.

It is not a de Polignac number, because 16969884780257 - 2¹² = 16969884776161 is a prime.

It is not a weakly prime, because it can be changed into another prime (16969884780217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8484942390128 + 8484942390129.

It is an arithmetic number, because the mean of its divisors is an integer number (8484942390129).

Almost surely, 2^{16969884780257} is an apocalyptic number.

It is an amenable number.

16969884780257 is a deficient number, since it is larger than the sum of its proper divisors (1).

16969884780257 is an equidigital number, since it uses as much as digits as its factorization.

16969884780257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2926264320, while the sum is 80.

The spelling of 16969884780257 in words is "sixteen trillion, nine hundred sixty-nine billion, eight hundred eighty-four million, seven hundred eighty thousand, two hundred fifty-seven".