503318760649 has 4 divisors (see below), whose sum is σ = 505135796164. Its totient is φ = 501501725136.

The previous prime is 503318760641. The next prime is 503318760677. The reversal of 503318760649 is 946067813305.

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 142832596624 + 360486164025 = 377932^2 + 600405^2 .

It is a cyclic number.

It is not a de Polignac number, because 503318760649 - 2³ = 503318760641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 503318760596 and 503318760605.

It is not an unprimeable number, because it can be changed into a prime (503318760641) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 908517342 + ... + 908517895.

It is an arithmetic number, because the mean of its divisors is an integer number (126283949041).

Almost surely, 2^503318760649 is an apocalyptic number.

It is an amenable number.

503318760649 is a deficient number, since it is larger than the sum of its proper divisors (1817035515).

503318760649 is a wasteful number, since it uses less digits than its factorization.

503318760649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1817035514.

The product of its (nonzero) digits is 3265920, while the sum is 52.

The spelling of 503318760649 in words is "five hundred three billion, three hundred eighteen million, seven hundred sixty thousand, six hundred forty-nine".