1081684506517 has 2 divisors, whose sum is σ = 1081684506518. Its totient is φ = 1081684506516.

The previous prime is 1081684506439. The next prime is 1081684506559. The reversal of 1081684506517 is 7156054861801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 769411419921 + 312273086596 = 877161^2 + 558814^2 .

It is a cyclic number.

It is not a de Polignac number, because 1081684506517 - 2³⁹ = 531928692629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1081684506587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540842253258 + 540842253259.

It is an arithmetic number, because the mean of its divisors is an integer number (540842253259).

Almost surely, 2^{1081684506517} is an apocalyptic number.

It is an amenable number.

1081684506517 is a deficient number, since it is larger than the sum of its proper divisors (1).

1081684506517 is an equidigital number, since it uses as much as digits as its factorization.

1081684506517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1612800, while the sum is 52.

The spelling of 1081684506517 in words is "one trillion, eighty-one billion, six hundred eighty-four million, five hundred six thousand, five hundred seventeen".