503512540505549 has 2 divisors, whose sum is σ = 503512540505550. Its totient is φ = 503512540505548.

The previous prime is 503512540505497. The next prime is 503512540505603. The reversal of 503512540505549 is 945505045215305.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 481655138969449 + 21857401536100 = 21946643^2 + 4675190^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-503512540505549 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 503512540505549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (503512540565549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251756270252774 + 251756270252775.

It is an arithmetic number, because the mean of its divisors is an integer number (251756270252775).

Almost surely, 2^{503512540505549} is an apocalyptic number.

It is an amenable number.

503512540505549 is a deficient number, since it is larger than the sum of its proper divisors (1).

503512540505549 is an equidigital number, since it uses as much as digits as its factorization.

503512540505549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13500000, while the sum is 53.

The spelling of 503512540505549 in words is "five hundred three trillion, five hundred twelve billion, five hundred forty million, five hundred five thousand, five hundred forty-nine".