1271580890005 has 4 divisors (see below), whose sum is σ = 1525897068012. Its totient is φ = 1017264712000.

The previous prime is 1271580890003. The next prime is 1271580890029. The reversal of 1271580890005 is 5000980851721.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 189685509841 + 1081895380164 = 435529^2 + 1040142^2 .

It is not a de Polignac number, because 1271580890005 - 2¹ = 1271580890003 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271580890003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127158088996 + ... + 127158089005.

It is an arithmetic number, because the mean of its divisors is an integer number (381474267003).

Almost surely, 2^{1271580890005} is an apocalyptic number.

It is an amenable number.

1271580890005 is a deficient number, since it is larger than the sum of its proper divisors (254316178007).

1271580890005 is an equidigital number, since it uses as much as digits as its factorization.

1271580890005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254316178006.

The product of its (nonzero) digits is 201600, while the sum is 46.

The spelling of 1271580890005 in words is "one trillion, two hundred seventy-one billion, five hundred eighty million, eight hundred ninety thousand, five".