320453772473 has 4 divisors (see below), whose sum is σ = 320454955380. Its totient is φ = 320452589568.

The previous prime is 320453772451. The next prime is 320453772533. The reversal of 320453772473 is 374277354023.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 131691329449 + 188762443024 = 362893^2 + 434468^2 .

It is a cyclic number.

It is not a de Polignac number, because 320453772473 - 2²⁰ = 320452723897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320453772413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38693 + ... + 801501.

It is an arithmetic number, because the mean of its divisors is an integer number (80113738845).

Almost surely, 2^320453772473 is an apocalyptic number.

It is an amenable number.

320453772473 is a deficient number, since it is larger than the sum of its proper divisors (1182907).

320453772473 is an equidigital number, since it uses as much as digits as its factorization.

320453772473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1182906.

The product of its (nonzero) digits is 2963520, while the sum is 47.

The spelling of 320453772473 in words is "three hundred twenty billion, four hundred fifty-three million, seven hundred seventy-two thousand, four hundred seventy-three".