320520551492 has 24 divisors (see below), whose sum is σ = 564014004120. Its totient is φ = 159375937280.

The previous prime is 320520551443. The next prime is 320520551497. The reversal of 320520551492 is 294155025023.

It can be written as a sum of positive squares in 4 ways, for example, as 215949807616 + 104570743876 = 464704^2 + 323374^2 .

It is not an unprimeable number, because it can be changed into a prime (320520551497) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 291998 + ... + 852234.

It is an arithmetic number, because the mean of its divisors is an integer number (23500583505).

Almost surely, 2^320520551492 is an apocalyptic number.

It is an amenable number.

320520551492 is a deficient number, since it is larger than the sum of its proper divisors (243493452628).

320520551492 is a wasteful number, since it uses less digits than its factorization.

320520551492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561031 (or 561029 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 38.

The spelling of 320520551492 in words is "three hundred twenty billion, five hundred twenty million, five hundred fifty-one thousand, four hundred ninety-two".