17968321601 has 2 divisors, whose sum is σ = 17968321602. Its totient is φ = 17968321600.

The previous prime is 17968321577. The next prime is 17968321607. The reversal of 17968321601 is 10612386971.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11540130625 + 6428190976 = 107425^2 + 80176^2 .

It is a cyclic number.

It is not a de Polignac number, because 17968321601 - 2¹⁸ = 17968059457 is a prime.

It is not a weakly prime, because it can be changed into another prime (17968321607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8984160800 + 8984160801.

It is an arithmetic number, because the mean of its divisors is an integer number (8984160801).

Almost surely, 2^17968321601 is an apocalyptic number.

It is an amenable number.

17968321601 is a deficient number, since it is larger than the sum of its proper divisors (1).

17968321601 is an equidigital number, since it uses as much as digits as its factorization.

17968321601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 44.

The spelling of 17968321601 in words is "seventeen billion, nine hundred sixty-eight million, three hundred twenty-one thousand, six hundred one".