2871438181265 has 4 divisors (see below), whose sum is σ = 3445725817524. Its totient is φ = 2297150545008.

The previous prime is 2871438181237. The next prime is 2871438181273. The reversal of 2871438181265 is 5621818341782.

It is a happy number.

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 715688928256 + 2155749253009 = 845984^2 + 1468247^2 .

It is a cyclic number.

It is not a de Polignac number, because 2871438181265 - 2¹² = 2871438177169 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2871438181265.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 287143818122 + ... + 287143818131.

It is an arithmetic number, because the mean of its divisors is an integer number (861431454381).

Almost surely, 2^{2871438181265} is an apocalyptic number.

It is an amenable number.

2871438181265 is a deficient number, since it is larger than the sum of its proper divisors (574287636259).

2871438181265 is an equidigital number, since it uses as much as digits as its factorization.

2871438181265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574287636258.

The product of its digits is 5160960, while the sum is 56.

The spelling of 2871438181265 in words is "two trillion, eight hundred seventy-one billion, four hundred thirty-eight million, one hundred eighty-one thousand, two hundred sixty-five".