1691120001143 has 2 divisors, whose sum is σ = 1691120001144. Its totient is φ = 1691120001142.

The previous prime is 1691120001139. The next prime is 1691120001209. The reversal of 1691120001143 is 3411000211961.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1691120001143 - 2² = 1691120001139 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1691120001343) 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, 845560000571 + 845560000572.

It is an arithmetic number, because the mean of its divisors is an integer number (845560000572).

Almost surely, 2^{1691120001143} is an apocalyptic number.

1691120001143 is a deficient number, since it is larger than the sum of its proper divisors (1).

1691120001143 is an equidigital number, since it uses as much as digits as its factorization.

1691120001143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 29.

The spelling of 1691120001143 in words is "one trillion, six hundred ninety-one billion, one hundred twenty million, one thousand, one hundred forty-three".