1600322561 has 2 divisors, whose sum is σ = 1600322562. Its totient is φ = 1600322560.

The previous prime is 1600322531. The next prime is 1600322569. The reversal of 1600322561 is 1652230061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1472180161 + 128142400 = 38369^2 + 11320^2 .

It is a cyclic number.

It is not a de Polignac number, because 1600322561 - 2¹⁴ = 1600306177 is a prime.

It is a super-3 number, since 3×1600322561³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 1600322561.

It is not a weakly prime, because it can be changed into another prime (1600322569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800161280 + 800161281.

It is an arithmetic number, because the mean of its divisors is an integer number (800161281).

Almost surely, 2^1600322561 is an apocalyptic number.

It is an amenable number.

1600322561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1600322561 is an equidigital number, since it uses as much as digits as its factorization.

1600322561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 1600322561 is about 40004.0318093064. The cubic root of 1600322561 is about 1169.6856878444.

The spelling of 1600322561 in words is "one billion, six hundred million, three hundred twenty-two thousand, five hundred sixty-one".