321139656843 has 8 divisors (see below), whose sum is σ = 428201359248. Its totient is φ = 214085529504.

The previous prime is 321139656821. The next prime is 321139656847. The reversal of 321139656843 is 348656931123.

It is a happy number.

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

It is not a de Polignac number, because 321139656843 - 2¹⁰ = 321139655819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (321139656847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1794096 + ... + 1964957.

It is an arithmetic number, because the mean of its divisors is an integer number (53525169906).

Almost surely, 2^321139656843 is an apocalyptic number.

321139656843 is a deficient number, since it is larger than the sum of its proper divisors (107061702405).

321139656843 is a wasteful number, since it uses less digits than its factorization.

321139656843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3787533.

The product of its digits is 2799360, while the sum is 51.

The spelling of 321139656843 in words is "three hundred twenty-one billion, one hundred thirty-nine million, six hundred fifty-six thousand, eight hundred forty-three".