321818478039 has 12 divisors (see below), whose sum is σ = 464854067496. Its totient is φ = 214543272912.

The previous prime is 321818478031. The next prime is 321818478073. The reversal of 321818478039 is 930874818123.

It is a happy number.

It is not a de Polignac number, because 321818478039 - 2³ = 321818478031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321818478031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1119229 + ... + 1377065.

It is an arithmetic number, because the mean of its divisors is an integer number (38737838958).

Almost surely, 2^321818478039 is an apocalyptic number.

321818478039 is a deficient number, since it is larger than the sum of its proper divisors (143035589457).

321818478039 is a wasteful number, since it uses less digits than its factorization.

321818478039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396526 (or 396523 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The spelling of 321818478039 in words is "three hundred twenty-one billion, eight hundred eighteen million, four hundred seventy-eight thousand, thirty-nine".