320535521552 has 60 divisors (see below), whose sum is σ = 683941939200. Its totient is φ = 145231137216.

The previous prime is 320535521521. The next prime is 320535521557. The reversal of 320535521552 is 255125535023.

It is a super-2 number, since 2×320535521552² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (320535521557) 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 11 ways as a sum of consecutive naturals, for example, 1073552 + ... + 1339247.

It is an arithmetic number, because the mean of its divisors is an integer number (11399032320).

Almost surely, 2^320535521552 is an apocalyptic number.

It is an amenable number.

320535521552 is an abundant number, since it is smaller than the sum of its proper divisors (363406417648).

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

320535521552 is a wasteful number, since it uses less digits than its factorization.

320535521552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2412868 (or 2412843 counting only the distinct ones).

The product of its (nonzero) digits is 225000, while the sum is 38.

The spelling of 320535521552 in words is "three hundred twenty billion, five hundred thirty-five million, five hundred twenty-one thousand, five hundred fifty-two".