321540425352 has 96 divisors (see below), whose sum is σ = 883442359800. Its totient is φ = 105636630528.

The previous prime is 321540425347. The next prime is 321540425399. The reversal of 321540425352 is 253524045123.

321540425352 is a `hidden beast` number, since 3 + 21 + 540 + 42 + 5 + 3 + 52 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 204128661636 + 117411763716 = 451806^2 + 342654^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1925548 + ... + 2085860.

Almost surely, 2^321540425352 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 321540425352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (441721179900).

321540425352 is an abundant number, since it is smaller than the sum of its proper divisors (561901934448).

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

321540425352 is a wasteful number, since it uses less digits than its factorization.

321540425352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160727 (or 160720 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 36.

The spelling of 321540425352 in words is "three hundred twenty-one billion, five hundred forty million, four hundred twenty-five thousand, three hundred fifty-two".