320782050553 has 4 divisors (see below), whose sum is σ = 324089082100. Its totient is φ = 317475019008.

The previous prime is 320782050539. The next prime is 320782050559. The reversal of 320782050553 is 355050287023.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50223947449 + 270558103104 = 224107^2 + 520152^2 .

It is a cyclic number.

It is not a de Polignac number, because 320782050553 - 2⁵ = 320782050521 is a prime.

It is a super-2 number, since 2×320782050553² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320782050559) 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, 1653515628 + ... + 1653515821.

It is an arithmetic number, because the mean of its divisors is an integer number (81022270525).

Almost surely, 2^320782050553 is an apocalyptic number.

It is an amenable number.

320782050553 is a deficient number, since it is larger than the sum of its proper divisors (3307031547).

320782050553 is an equidigital number, since it uses as much as digits as its factorization.

320782050553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3307031546.

The product of its (nonzero) digits is 252000, while the sum is 40.

The spelling of 320782050553 in words is "three hundred twenty billion, seven hundred eighty-two million, fifty thousand, five hundred fifty-three".