500051601601 has 2 divisors, whose sum is σ = 500051601602. Its totient is φ = 500051601600.

The previous prime is 500051601589. The next prime is 500051601617. The reversal of 500051601601 is 106106150005.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 335316274225 + 164735327376 = 579065^2 + 405876^2 .

It is a cyclic number.

It is not a de Polignac number, because 500051601601 - 2⁹ = 500051601089 is a prime.

It is not a weakly prime, because it can be changed into another prime (500051601001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250025800800 + 250025800801.

It is an arithmetic number, because the mean of its divisors is an integer number (250025800801).

Almost surely, 2^500051601601 is an apocalyptic number.

It is an amenable number.

500051601601 is a deficient number, since it is larger than the sum of its proper divisors (1).

500051601601 is an equidigital number, since it uses as much as digits as its factorization.

500051601601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900, while the sum is 25.

Adding to 500051601601 its reverse (106106150005), we get a palindrome (606157751606).

The spelling of 500051601601 in words is "five hundred billion, fifty-one million, six hundred one thousand, six hundred one".