808138271839 has 4 divisors (see below), whose sum is σ = 808140226824. Its totient is φ = 808136316856.

The previous prime is 808138271827. The next prime is 808138271867. The reversal of 808138271839 is 938172831808.

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

It is a cyclic number.

It is not a de Polignac number, because 808138271839 - 2⁹ = 808138271327 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (808138271819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87052 + ... + 1274305.

It is an arithmetic number, because the mean of its divisors is an integer number (202035056706).

Almost surely, 2^808138271839 is an apocalyptic number.

808138271839 is a deficient number, since it is larger than the sum of its proper divisors (1954985).

808138271839 is a wasteful number, since it uses less digits than its factorization.

808138271839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1954984.

The product of its (nonzero) digits is 4644864, while the sum is 58.

The spelling of 808138271839 in words is "eight hundred eight billion, one hundred thirty-eight million, two hundred seventy-one thousand, eight hundred thirty-nine".