165680895042437 has 2 divisors, whose sum is σ = 165680895042438. Its totient is φ = 165680895042436.

The previous prime is 165680895042413. The next prime is 165680895042469. The reversal of 165680895042437 is 734240598086561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 153762008806561 + 11918886235876 = 12400081^2 + 3452374^2 .

It is a cyclic number.

It is not a de Polignac number, because 165680895042437 - 2⁴⁰ = 164581383414661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165680895042137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82840447521218 + 82840447521219.

It is an arithmetic number, because the mean of its divisors is an integer number (82840447521219).

It is a 1-persistent number, because it is pandigital, but 2⋅165680895042437 = 331361790084874 is not.

Almost surely, 2^{165680895042437} is an apocalyptic number.

It is an amenable number.

165680895042437 is a deficient number, since it is larger than the sum of its proper divisors (1).

165680895042437 is an equidigital number, since it uses as much as digits as its factorization.

165680895042437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 348364800, while the sum is 68.

The spelling of 165680895042437 in words is "one hundred sixty-five trillion, six hundred eighty billion, eight hundred ninety-five million, forty-two thousand, four hundred thirty-seven".