1691994536083 has 2 divisors, whose sum is σ = 1691994536084. Its totient is φ = 1691994536082.

The previous prime is 1691994536059. The next prime is 1691994536263. The reversal of 1691994536083 is 3806354991961.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1691994536083 - 2¹⁷ = 1691994405011 is a prime.

It is not a weakly prime, because it can be changed into another prime (1691994536033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 845997268041 + 845997268042.

It is an arithmetic number, because the mean of its divisors is an integer number (845997268042).

Almost surely, 2^{1691994536083} is an apocalyptic number.

1691994536083 is a deficient number, since it is larger than the sum of its proper divisors (1).

1691994536083 is an equidigital number, since it uses as much as digits as its factorization.

1691994536083 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37791360, while the sum is 64.

The spelling of 1691994536083 in words is "one trillion, six hundred ninety-one billion, nine hundred ninety-four million, five hundred thirty-six thousand, eighty-three".