321005241640 has 16 divisors (see below), whose sum is σ = 722261793780. Its totient is φ = 128402096640.

The previous prime is 321005241629. The next prime is 321005241643. The reversal of 321005241640 is 46142500123.

It can be written as a sum of positive squares in 2 ways, for example, as 296343051876 + 24662189764 = 544374^2 + 157042^2 .

It is a super-3 number, since 3×321005241640³ (a number of 35 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 321005241599 and 321005241608.

It is not an unprimeable number, because it can be changed into a prime (321005241643) by changing a digit.

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, 4012565481 + ... + 4012565560.

Almost surely, 2^321005241640 is an apocalyptic number.

It is an amenable number.

321005241640 is an abundant number, since it is smaller than the sum of its proper divisors (401256552140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

321005241640 is a wasteful number, since it uses less digits than its factorization.

321005241640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8025131052 (or 8025131048 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 321005241640 its reverse (46142500123), we get a palindrome (367147741763).

The spelling of 321005241640 in words is "three hundred twenty-one billion, five million, two hundred forty-one thousand, six hundred forty".