2005610161 has 4 divisors (see below), whose sum is σ = 2054527524. Its totient is φ = 1956692800.

The previous prime is 2005610147. The next prime is 2005610213. The reversal of 2005610161 is 1610165002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 268304400 + 1737305761 = 16380^2 + 41681^2 .

It is a cyclic number.

It is not a de Polignac number, because 2005610161 - 2¹⁵ = 2005577393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2005610141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24458620 + ... + 24458701.

It is an arithmetic number, because the mean of its divisors is an integer number (513631881).

Almost surely, 2^2005610161 is an apocalyptic number.

It is an amenable number.

2005610161 is a deficient number, since it is larger than the sum of its proper divisors (48917363).

2005610161 is an equidigital number, since it uses as much as digits as its factorization.

2005610161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48917362.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 2005610161 is about 44784.0391322623. The cubic root of 2005610161 is about 1261.0980100801.

Adding to 2005610161 its reverse (1610165002), we get a palindrome (3615775163).

The spelling of 2005610161 in words is "two billion, five million, six hundred ten thousand, one hundred sixty-one".