1631797163873 has 2 divisors, whose sum is σ = 1631797163874. Its totient is φ = 1631797163872.

The previous prime is 1631797163831. The next prime is 1631797163881. The reversal of 1631797163873 is 3783617971361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1605511999744 + 26285164129 = 1267088^2 + 162127^2 .

It is an emirp because it is prime and its reverse (3783617971361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1631797163873 - 2¹⁸ = 1631796901729 is a prime.

It is not a weakly prime, because it can be changed into another prime (1631797163173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815898581936 + 815898581937.

It is an arithmetic number, because the mean of its divisors is an integer number (815898581937).

Almost surely, 2^{1631797163873} is an apocalyptic number.

It is an amenable number.

1631797163873 is a deficient number, since it is larger than the sum of its proper divisors (1).

1631797163873 is an equidigital number, since it uses as much as digits as its factorization.

1631797163873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24004512, while the sum is 62.

The spelling of 1631797163873 in words is "one trillion, six hundred thirty-one billion, seven hundred ninety-seven million, one hundred sixty-three thousand, eight hundred seventy-three".