320513534532 has 72 divisors (see below), whose sum is σ = 818414880192. Its totient is φ = 105753384000.

The previous prime is 320513534513. The next prime is 320513534533. The reversal of 320513534532 is 235435315023.

320513534532 is a `hidden beast` number, since 3 + 20 + 51 + 3 + 53 + 4 + 532 = 666.

It is a super-3 number, since 3×320513534532³ (a number of 35 digits) contains 333 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (320513534533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18793233 + ... + 18810279.

It is an arithmetic number, because the mean of its divisors is an integer number (11366873336).

Almost surely, 2^320513534532 is an apocalyptic number.

It is an amenable number.

320513534532 is an abundant number, since it is smaller than the sum of its proper divisors (497901345660).

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

320513534532 is a wasteful number, since it uses less digits than its factorization.

320513534532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22329 (or 22324 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 36.

Adding to 320513534532 its reverse (235435315023), we get a palindrome (555948849555).

The spelling of 320513534532 in words is "three hundred twenty billion, five hundred thirteen million, five hundred thirty-four thousand, five hundred thirty-two".