2005061615 has 4 divisors (see below), whose sum is σ = 2406073944. Its totient is φ = 1604049288.

The previous prime is 2005061579. The next prime is 2005061657. The reversal of 2005061615 is 5161605002.

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 2005061615 - 2¹⁰ = 2005060591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200506157 + ... + 200506166.

It is an arithmetic number, because the mean of its divisors is an integer number (601518486).

Almost surely, 2^2005061615 is an apocalyptic number.

2005061615 is a deficient number, since it is larger than the sum of its proper divisors (401012329).

2005061615 is an equidigital number, since it uses as much as digits as its factorization.

2005061615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401012328.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 2005061615 is about 44777.9143663481. The cubic root of 2005061615 is about 1260.9830270590.

Adding to 2005061615 its reverse (5161605002), we get a palindrome (7166666617).

The spelling of 2005061615 in words is "two billion, five million, sixty-one thousand, six hundred fifteen".