505166202001 has 4 divisors (see below), whose sum is σ = 505554494004. Its totient is φ = 504777910000.

The previous prime is 505166201983. The next prime is 505166202029. The reversal of 505166202001 is 100202661505.

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 249924005776 + 255242196225 = 499924^2 + 505215^2 .

It is a cyclic number.

It is not a de Polignac number, because 505166202001 - 2⁷ = 505166201873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505166202041) 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, 194144050 + ... + 194146651.

It is an arithmetic number, because the mean of its divisors is an integer number (126388623501).

Almost surely, 2^505166202001 is an apocalyptic number.

It is an amenable number.

505166202001 is a deficient number, since it is larger than the sum of its proper divisors (388292003).

505166202001 is a wasteful number, since it uses less digits than its factorization.

505166202001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388292002.

The product of its (nonzero) digits is 3600, while the sum is 28.

Adding to 505166202001 its reverse (100202661505), we get a palindrome (605368863506).

The spelling of 505166202001 in words is "five hundred five billion, one hundred sixty-six million, two hundred two thousand, one".