2691438871 has 8 divisors (see below), whose sum is σ = 2943515664. Its totient is φ = 2440595520.

The previous prime is 2691438851. The next prime is 2691438877. The reversal of 2691438871 is 1788341962.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2691438871 - 2⁹ = 2691438359 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 (2691438877) 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 7 ways as a sum of consecutive naturals, for example, 303790 + ... + 312523.

It is an arithmetic number, because the mean of its divisors is an integer number (367939458).

Almost surely, 2^2691438871 is an apocalyptic number.

2691438871 is a deficient number, since it is larger than the sum of its proper divisors (252076793).

2691438871 is a wasteful number, since it uses less digits than its factorization.

2691438871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616721.

The product of its digits is 580608, while the sum is 49.

The square root of 2691438871 is about 51879.0793191244. The cubic root of 2691438871 is about 1391.0033421441.

The spelling of 2691438871 in words is "two billion, six hundred ninety-one million, four hundred thirty-eight thousand, eight hundred seventy-one".