17620268689 has 2 divisors, whose sum is σ = 17620268690. Its totient is φ = 17620268688.

The previous prime is 17620268663. The next prime is 17620268693. The reversal of 17620268689 is 98686202671.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15367817089 + 2252451600 = 123967^2 + 47460^2 .

It is a cyclic number.

It is not a de Polignac number, because 17620268689 - 2⁵ = 17620268657 is a prime.

It is not a weakly prime, because it can be changed into another prime (17620238689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8810134344 + 8810134345.

It is an arithmetic number, because the mean of its divisors is an integer number (8810134345).

Almost surely, 2^17620268689 is an apocalyptic number.

It is an amenable number.

17620268689 is a deficient number, since it is larger than the sum of its proper divisors (1).

17620268689 is an equidigital number, since it uses as much as digits as its factorization.

17620268689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3483648, while the sum is 55.

The spelling of 17620268689 in words is "seventeen billion, six hundred twenty million, two hundred sixty-eight thousand, six hundred eighty-nine".