1606221300413 has 2 divisors, whose sum is σ = 1606221300414. Its totient is φ = 1606221300412.

The previous prime is 1606221300391. The next prime is 1606221300427. The reversal of 1606221300413 is 3140031226061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1597804705849 + 8416594564 = 1264043^2 + 91742^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1606221300413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1606221300473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 803110650206 + 803110650207.

It is an arithmetic number, because the mean of its divisors is an integer number (803110650207).

Almost surely, 2^{1606221300413} is an apocalyptic number.

It is an amenable number.

1606221300413 is a deficient number, since it is larger than the sum of its proper divisors (1).

1606221300413 is an equidigital number, since it uses as much as digits as its factorization.

1606221300413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

Adding to 1606221300413 its reverse (3140031226061), we get a palindrome (4746252526474).

The spelling of 1606221300413 in words is "one trillion, six hundred six billion, two hundred twenty-one million, three hundred thousand, four hundred thirteen".