1691313332101 has 2 divisors, whose sum is σ = 1691313332102. Its totient is φ = 1691313332100.

The previous prime is 1691313332099. The next prime is 1691313332119. The reversal of 1691313332101 is 1012333131961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1607129211076 + 84184121025 = 1267726^2 + 290145^2 .

It is an emirp because it is prime and its reverse (1012333131961) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1691313332101 - 2¹ = 1691313332099 is a prime.

Together with 1691313332099, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1691313332171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 845656666050 + 845656666051.

It is an arithmetic number, because the mean of its divisors is an integer number (845656666051).

Almost surely, 2^{1691313332101} is an apocalyptic number.

It is an amenable number.

1691313332101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1691313332101 is an equidigital number, since it uses as much as digits as its factorization.

1691313332101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 34.

The spelling of 1691313332101 in words is "one trillion, six hundred ninety-one billion, three hundred thirteen million, three hundred thirty-two thousand, one hundred one".