320644161601 has 8 divisors (see below), whose sum is σ = 321090215400. Its totient is φ = 320198244480.

The previous prime is 320644161599. The next prime is 320644161623. The reversal of 320644161601 is 106161446023.

It can be written as a sum of positive squares in 4 ways, for example, as 39929630976 + 280714530625 = 199824^2 + 529825^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 320644161601 - 2¹ = 320644161599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320644161701) 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, 5214805 + ... + 5275933.

It is an arithmetic number, because the mean of its divisors is an integer number (40136276925).

Almost surely, 2^320644161601 is an apocalyptic number.

It is an amenable number.

320644161601 is a deficient number, since it is larger than the sum of its proper divisors (446053799).

320644161601 is an equidigital number, since it uses as much as digits as its factorization.

320644161601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68339.

The product of its (nonzero) digits is 20736, while the sum is 34.

The spelling of 320644161601 in words is "three hundred twenty billion, six hundred forty-four million, one hundred sixty-one thousand, six hundred one".