2805142505 has 16 divisors (see below), whose sum is σ = 3683107584. Its totient is φ = 2034036480.

The previous prime is 2805142499. The next prime is 2805142513. The reversal of 2805142505 is 5052415082.

It is not a de Polignac number, because 2805142505 - 2¹² = 2805138409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 57137 + ... + 94206.

It is an arithmetic number, because the mean of its divisors is an integer number (230194224).

Almost surely, 2^2805142505 is an apocalyptic number.

It is an amenable number.

2805142505 is a deficient number, since it is larger than the sum of its proper divisors (877965079).

2805142505 is a wasteful number, since it uses less digits than its factorization.

2805142505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151696.

The product of its (nonzero) digits is 16000, while the sum is 32.

The square root of 2805142505 is about 52963.5960353902. The cubic root of 2805142505 is about 1410.3220941480.

Adding to 2805142505 its reverse (5052415082), we get a palindrome (7857557587).

The spelling of 2805142505 in words is "two billion, eight hundred five million, one hundred forty-two thousand, five hundred five".