2005601867 has 4 divisors (see below), whose sum is σ = 2111159880. Its totient is φ = 1900043856.

The previous prime is 2005601849. The next prime is 2005601869. The reversal of 2005601867 is 7681065002.

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

It is a cyclic number.

It is not a de Polignac number, because 2005601867 - 2¹⁰ = 2005600843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2005601869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52778978 + ... + 52779015.

It is an arithmetic number, because the mean of its divisors is an integer number (527789970).

Almost surely, 2^2005601867 is an apocalyptic number.

2005601867 is a deficient number, since it is larger than the sum of its proper divisors (105558013).

2005601867 is a wasteful number, since it uses less digits than its factorization.

2005601867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105558012.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 2005601867 is about 44783.9465322117. The cubic root of 2005601867 is about 1261.0962716962.

Adding to 2005601867 its reverse (7681065002), we get a palindrome (9686666869).

The spelling of 2005601867 in words is "two billion, five million, six hundred one thousand, eight hundred sixty-seven".