1791435018091 has 2 divisors, whose sum is σ = 1791435018092. Its totient is φ = 1791435018090.

The previous prime is 1791435018053. The next prime is 1791435018133. The reversal of 1791435018091 is 1908105341971.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1791435018091 - 2²¹ = 1791432920939 is a prime.

It is not a weakly prime, because it can be changed into another prime (1791435018011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 895717509045 + 895717509046.

It is an arithmetic number, because the mean of its divisors is an integer number (895717509046).

Almost surely, 2^{1791435018091} is an apocalyptic number.

1791435018091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1791435018091 is an equidigital number, since it uses as much as digits as its factorization.

1791435018091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 49.

The spelling of 1791435018091 in words is "one trillion, seven hundred ninety-one billion, four hundred thirty-five million, eighteen thousand, ninety-one".