501834810409 has 3 divisors (see below), whose sum is σ = 501835518813. Its totient is φ = 501834102006.

The previous prime is 501834810383. The next prime is 501834810413. The reversal of 501834810409 is 904018438105.

The square root of 501834810409 is 708403.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 501834810409 - 2²¹ = 501832713257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (501834810419) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 354202 + ... + 1062604.

It is an arithmetic number, because the mean of its divisors is an integer number (167278506271).

Almost surely, 2^501834810409 is an apocalyptic number.

501834810409 is the 708403-rd square number.

501834810409 is the 354202-nd centered octagonal number.

It is an amenable number.

501834810409 is a deficient number, since it is larger than the sum of its proper divisors (708404).

501834810409 is an frugal number, since it uses more digits than its factorization.

501834810409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1416806 (or 708403 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 43.

The spelling of 501834810409 in words is "five hundred one billion, eight hundred thirty-four million, eight hundred ten thousand, four hundred nine".