1691115804799 has 2 divisors, whose sum is σ = 1691115804800. Its totient is φ = 1691115804798.

The previous prime is 1691115804797. The next prime is 1691115804803. The reversal of 1691115804799 is 9974085111961.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1691115804799 - 2¹ = 1691115804797 is a prime.

Together with 1691115804797, 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 (1691115804797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 845557902399 + 845557902400.

It is an arithmetic number, because the mean of its divisors is an integer number (845557902400).

Almost surely, 2^{1691115804799} is an apocalyptic number.

1691115804799 is a deficient number, since it is larger than the sum of its proper divisors (1).

1691115804799 is an equidigital number, since it uses as much as digits as its factorization.

1691115804799 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4898880, while the sum is 61.

The spelling of 1691115804799 in words is "one trillion, six hundred ninety-one billion, one hundred fifteen million, eight hundred four thousand, seven hundred ninety-nine".