1727661427873 has 2 divisors, whose sum is σ = 1727661427874. Its totient is φ = 1727661427872.

The previous prime is 1727661427871. The next prime is 1727661427939. The reversal of 1727661427873 is 3787241667271.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1719122189409 + 8539238464 = 1311153^2 + 92408^2 .

It is a cyclic number.

It is not a de Polignac number, because 1727661427873 - 2¹ = 1727661427871 is a prime.

Together with 1727661427871, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1727661427871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 863830713936 + 863830713937.

It is an arithmetic number, because the mean of its divisors is an integer number (863830713937).

Almost surely, 2^{1727661427873} is an apocalyptic number.

It is an amenable number.

1727661427873 is a deficient number, since it is larger than the sum of its proper divisors (1).

1727661427873 is an equidigital number, since it uses as much as digits as its factorization.

1727661427873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 33191424, while the sum is 61.

The spelling of 1727661427873 in words is "one trillion, seven hundred twenty-seven billion, six hundred sixty-one million, four hundred twenty-seven thousand, eight hundred seventy-three".