320440053553 has 2 divisors, whose sum is σ = 320440053554. Its totient is φ = 320440053552.

The previous prime is 320440053467. The next prime is 320440053559. The reversal of 320440053553 is 355350044023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 313592160049 + 6847893504 = 559993^2 + 82752^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320440053553 is a prime.

It is not a weakly prime, because it can be changed into another prime (320440053559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160220026776 + 160220026777.

It is an arithmetic number, because the mean of its divisors is an integer number (160220026777).

Almost surely, 2^320440053553 is an apocalyptic number.

It is an amenable number.

320440053553 is a deficient number, since it is larger than the sum of its proper divisors (1).

320440053553 is an equidigital number, since it uses as much as digits as its factorization.

320440053553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108000, while the sum is 34.

Adding to 320440053553 its reverse (355350044023), we get a palindrome (675790097576).

The spelling of 320440053553 in words is "three hundred twenty billion, four hundred forty million, fifty-three thousand, five hundred fifty-three".