6839682190221 has 4 divisors (see below), whose sum is σ = 9119576253632. Its totient is φ = 4559788126812.

The previous prime is 6839682190073. The next prime is 6839682190223. The reversal of 6839682190221 is 1220912869386.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 6839682190221 - 2²³ = 6839673801613 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 (6839682190223) 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, 1139947031701 + ... + 1139947031706.

It is an arithmetic number, because the mean of its divisors is an integer number (2279894063408).

Almost surely, 2^{6839682190221} is an apocalyptic number.

It is an amenable number.

6839682190221 is a deficient number, since it is larger than the sum of its proper divisors (2279894063411).

6839682190221 is a wasteful number, since it uses less digits than its factorization.

6839682190221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2279894063410.

The product of its (nonzero) digits is 4478976, while the sum is 57.

The spelling of 6839682190221 in words is "six trillion, eight hundred thirty-nine billion, six hundred eighty-two million, one hundred ninety thousand, two hundred twenty-one".