201613571617 has 2 divisors, whose sum is σ = 201613571618. Its totient is φ = 201613571616.

The previous prime is 201613571597. The next prime is 201613571629. The reversal of 201613571617 is 716175316102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 162993068176 + 38620503441 = 403724^2 + 196521^2 .

It is a cyclic number.

It is not a de Polignac number, because 201613571617 - 2¹¹ = 201613569569 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201613571617.

It is not a weakly prime, because it can be changed into another prime (201613571017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100806785808 + 100806785809.

It is an arithmetic number, because the mean of its divisors is an integer number (100806785809).

Almost surely, 2^201613571617 is an apocalyptic number.

It is an amenable number.

201613571617 is a deficient number, since it is larger than the sum of its proper divisors (1).

201613571617 is an equidigital number, since it uses as much as digits as its factorization.

201613571617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52920, while the sum is 40.

Adding to 201613571617 its reverse (716175316102), we get a palindrome (917788887719).

The spelling of 201613571617 in words is "two hundred one billion, six hundred thirteen million, five hundred seventy-one thousand, six hundred seventeen".