617541161 has 2 divisors, whose sum is σ = 617541162. Its totient is φ = 617541160.

The previous prime is 617541151. The next prime is 617541181. The reversal of 617541161 is 161145716.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 459888025 + 157653136 = 21445^2 + 12556^2 .

It is a cyclic number.

It is not a de Polignac number, because 617541161 - 2¹⁰ = 617540137 is a prime.

It is a Chen prime.

It is equal to p_32191808 and since 617541161 and 32191808 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (617541151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308770580 + 308770581.

It is an arithmetic number, because the mean of its divisors is an integer number (308770581).

Almost surely, 2^617541161 is an apocalyptic number.

It is an amenable number.

617541161 is a deficient number, since it is larger than the sum of its proper divisors (1).

617541161 is an equidigital number, since it uses as much as digits as its factorization.

617541161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 32.

The square root of 617541161 is about 24850.3754700004. The cubic root of 617541161 is about 851.5731701052.

Adding to 617541161 its reverse (161145716), we get a palindrome (778686877).

The spelling of 617541161 in words is "six hundred seventeen million, five hundred forty-one thousand, one hundred sixty-one".