321097108864 has 64 divisors (see below), whose sum is σ = 731440196640. Its totient is φ = 137543233536.

The previous prime is 321097108853. The next prime is 321097108879. The reversal of 321097108864 is 468801790123.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1695822 + ... + 1875634.

Almost surely, 2^321097108864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 321097108864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (365720098320).

321097108864 is an abundant number, since it is smaller than the sum of its proper divisors (410343087776).

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

321097108864 is a wasteful number, since it uses less digits than its factorization.

321097108864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181827 (or 181815 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 49.

Adding to 321097108864 its reverse (468801790123), we get a palindrome (789898898987).

The spelling of 321097108864 in words is "three hundred twenty-one billion, ninety-seven million, one hundred eight thousand, eight hundred sixty-four".