1816169660413 has 2 divisors, whose sum is σ = 1816169660414. Its totient is φ = 1816169660412.

The previous prime is 1816169660401. The next prime is 1816169660533. The reversal of 1816169660413 is 3140669616181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1227615248484 + 588554411929 = 1107978^2 + 767173^2 .

It is a cyclic number.

It is not a de Polignac number, because 1816169660413 - 2²¹ = 1816167563261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1816169660113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 908084830206 + 908084830207.

It is an arithmetic number, because the mean of its divisors is an integer number (908084830207).

Almost surely, 2^{1816169660413} is an apocalyptic number.

It is an amenable number.

1816169660413 is a deficient number, since it is larger than the sum of its proper divisors (1).

1816169660413 is an equidigital number, since it uses as much as digits as its factorization.

1816169660413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1119744, while the sum is 52.

The spelling of 1816169660413 in words is "one trillion, eight hundred sixteen billion, one hundred sixty-nine million, six hundred sixty thousand, four hundred thirteen".