1005006050509 has 4 divisors (see below), whose sum is σ = 1006634910204. Its totient is φ = 1003377190816.

The previous prime is 1005006050471. The next prime is 1005006050513. The reversal of 1005006050509 is 9050506005001.

It is a happy number.

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 40725258025 + 964280792484 = 201805^2 + 981978^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1005006050509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005006057509) 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, 814428922 + ... + 814430155.

It is an arithmetic number, because the mean of its divisors is an integer number (251658727551).

Almost surely, 2^{1005006050509} is an apocalyptic number.

It is an amenable number.

1005006050509 is a deficient number, since it is larger than the sum of its proper divisors (1628859695).

1005006050509 is an equidigital number, since it uses as much as digits as its factorization.

1005006050509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1628859694.

The product of its (nonzero) digits is 6750, while the sum is 31.

The spelling of 1005006050509 in words is "one trillion, five billion, six million, fifty thousand, five hundred nine".