16703880664321 has 2 divisors, whose sum is σ = 16703880664322. Its totient is φ = 16703880664320.

The previous prime is 16703880664313. The next prime is 16703880664397. The reversal of 16703880664321 is 12346608830761.

16703880664321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16064352577296 + 639528087025 = 4008036^2 + 799705^2 .

It is a cyclic number.

It is not a de Polignac number, because 16703880664321 - 2³ = 16703880664313 is a prime.

It is not a weakly prime, because it can be changed into another prime (16703880664021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8351940332160 + 8351940332161.

It is an arithmetic number, because the mean of its divisors is an integer number (8351940332161).

Almost surely, 2^{16703880664321} is an apocalyptic number.

It is an amenable number.

16703880664321 is a deficient number, since it is larger than the sum of its proper divisors (1).

16703880664321 is an equidigital number, since it uses as much as digits as its factorization.

16703880664321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6967296, while the sum is 55.

The spelling of 16703880664321 in words is "sixteen trillion, seven hundred three billion, eight hundred eighty million, six hundred sixty-four thousand, three hundred twenty-one".