320977133569 has 6 divisors (see below), whose sum is σ = 340968789254. Its totient is φ = 302096125440.

The previous prime is 320977133563. The next prime is 320977133597. The reversal of 320977133569 is 965331779023.

It can be written as a sum of positive squares in 3 ways, for example, as 185175302400 + 135801831169 = 430320^2 + 368513^2 .

It is not a de Polignac number, because 320977133569 - 2¹⁹ = 320976609281 is a prime.

It is a super-2 number, since 2×320977133569² (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 (320977133563) 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 5 ways as a sum of consecutive naturals, for example, 555323472 + ... + 555324049.

Almost surely, 2^320977133569 is an apocalyptic number.

It is an amenable number.

320977133569 is a deficient number, since it is larger than the sum of its proper divisors (19991655685).

320977133569 is a wasteful number, since it uses less digits than its factorization.

320977133569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110647555 (or 1110647538 counting only the distinct ones).

The product of its (nonzero) digits is 6429780, while the sum is 55.

The spelling of 320977133569 in words is "three hundred twenty billion, nine hundred seventy-seven million, one hundred thirty-three thousand, five hundred sixty-nine".