321538897936 has 15 divisors (see below), whose sum is σ = 622986009373. Its totient is φ = 160768314880.

The previous prime is 321538897931. The next prime is 321538897951. The reversal of 321538897936 is 639798835123.

The square root of 321538897936 is 567044.

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., 61030737936 + 260508160000 = 247044^2 + 510400^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321538897931) 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 2 ways as a sum of consecutive naturals, for example, 2197296 + ... + 2339056.

Almost surely, 2^321538897936 is an apocalyptic number.

321538897936 is the 567044-th square number.

It is an amenable number.

321538897936 is a deficient number, since it is larger than the sum of its proper divisors (301447111437).

321538897936 is an frugal number, since it uses more digits than its factorization.

321538897936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283530 (or 141763 counting only the distinct ones).

The product of its digits is 58786560, while the sum is 64.

Multiplying 321538897936 by its sum of digits (64), we get a square (20578489467904 = 4536352²).

The spelling of 321538897936 in words is "three hundred twenty-one billion, five hundred thirty-eight million, eight hundred ninety-seven thousand, nine hundred thirty-six".