321966591242 has 8 divisors (see below), whose sum is σ = 487380620100. Its totient is φ = 159506384544.

The previous prime is 321966591227. The next prime is 321966591253. The reversal of 321966591242 is 242195669123.

It is a Cunningham number, because it is equal to 567421²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 321966591241 + 1 = 567421^2 + 1^2 .

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

It is a super-2 number, since 2×321966591242² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 738455267 + ... + 738455702.

Almost surely, 2^321966591242 is an apocalyptic number.

321966591242 is a deficient number, since it is larger than the sum of its proper divisors (165414028858).

321966591242 is a wasteful number, since it uses less digits than its factorization.

321966591242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1476911080.

The product of its digits is 1399680, while the sum is 50.

The spelling of 321966591242 in words is "three hundred twenty-one billion, nine hundred sixty-six million, five hundred ninety-one thousand, two hundred forty-two".