1791493910089 has 27 divisors (see below), whose sum is σ = 1955838984309. Its totient is φ = 1640211000480.

The previous prime is 1791493910081. The next prime is 1791493910111. The reversal of 1791493910089 is 9800193941971.

The square root of 1791493910089 is 1338467.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 969584855625 + 821909054464 = 984675^2 + 906592^2 .

It is not a de Polignac number, because 1791493910089 - 2³ = 1791493910081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1791493910081) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2592610234 + ... + 2592610924.

Almost surely, 2^{1791493910089} is an apocalyptic number.

1791493910089 is the 1338467-th square number.

1791493910089 is the 669234-th centered octagonal number.

It is an amenable number.

1791493910089 is a deficient number, since it is larger than the sum of its proper divisors (164345074220).

1791493910089 is an frugal number, since it uses more digits than its factorization.

1791493910089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1706 (or 853 counting only the distinct ones).

The product of its (nonzero) digits is 4408992, while the sum is 61.

The spelling of 1791493910089 in words is "one trillion, seven hundred ninety-one billion, four hundred ninety-three million, nine hundred ten thousand, eighty-nine".