503374043241721 has 4 divisors (see below), whose sum is σ = 503374142676132. Its totient is φ = 503373943807312.

The previous prime is 503374043241701. The next prime is 503374043241749. The reversal of 503374043241721 is 127142340473305.

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 205134579150400 + 298239464091321 = 14322520^2 + 17269611^2 .

It is a cyclic number.

It is not a de Polignac number, because 503374043241721 - 2¹⁷ = 503374043110649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (503374043241701) 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, 41691826 + ... + 52392331.

It is an arithmetic number, because the mean of its divisors is an integer number (125843535669033).

Almost surely, 2^{503374043241721} is an apocalyptic number.

It is an amenable number.

503374043241721 is a deficient number, since it is larger than the sum of its proper divisors (99434411).

503374043241721 is an equidigital number, since it uses as much as digits as its factorization.

503374043241721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99434410.

The product of its (nonzero) digits is 1693440, while the sum is 46.

The spelling of 503374043241721 in words is "five hundred three trillion, three hundred seventy-four billion, forty-three million, two hundred forty-one thousand, seven hundred twenty-one".