1605460766617 has 2 divisors, whose sum is σ = 1605460766618. Its totient is φ = 1605460766616.

The previous prime is 1605460766563. The next prime is 1605460766671. The reversal of 1605460766617 is 7166670645061.

Together with next prime (1605460766671) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (1605460766563) and next prime (1605460766671).

It can be written as a sum of positive squares in only one way, i.e., 1069313173776 + 536147592841 = 1034076^2 + 732221^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1605460766617 is a prime.

It is not a weakly prime, because it can be changed into another prime (1605460764617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 802730383308 + 802730383309.

It is an arithmetic number, because the mean of its divisors is an integer number (802730383309).

Almost surely, 2^{1605460766617} is an apocalyptic number.

It is an amenable number.

1605460766617 is a deficient number, since it is larger than the sum of its proper divisors (1).

1605460766617 is an equidigital number, since it uses as much as digits as its factorization.

1605460766617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7620480, while the sum is 55.

The spelling of 1605460766617 in words is "one trillion, six hundred five billion, four hundred sixty million, seven hundred sixty-six thousand, six hundred seventeen".