321769159009 has 9 divisors (see below), whose sum is σ = 330722234451. Its totient is φ = 313052274360.

The previous prime is 321769159007. The next prime is 321769159037. The reversal of 321769159009 is 900951967123.

It is a happy number.

The square root of 321769159009 is 567247.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 287923462225 + 33845696784 = 536585^2 + 183972^2 .

It is not a de Polignac number, because 321769159009 - 2¹ = 321769159007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321769159003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 20980474 + ... + 20995804.

It is an arithmetic number, because the mean of its divisors is an integer number (36746914939).

Almost surely, 2^321769159009 is an apocalyptic number.

321769159009 is the 567247-th square number.

321769159009 is the 283624-th centered octagonal number.

It is an amenable number.

321769159009 is a deficient number, since it is larger than the sum of its proper divisors (8953075442).

321769159009 is an frugal number, since it uses more digits than its factorization.

321769159009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30736 (or 15368 counting only the distinct ones).

The product of its (nonzero) digits is 918540, while the sum is 52.

The spelling of 321769159009 in words is "three hundred twenty-one billion, seven hundred sixty-nine million, one hundred fifty-nine thousand, nine".