509818741541 has 2 divisors, whose sum is σ = 509818741542. Its totient is φ = 509818741540.

The previous prime is 509818741519. The next prime is 509818741651. The reversal of 509818741541 is 145147818905.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 374134072225 + 135684669316 = 611665^2 + 368354^2 .

It is a cyclic number.

It is not a de Polignac number, because 509818741541 - 2⁶ = 509818741477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (509818749541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254909370770 + 254909370771.

It is an arithmetic number, because the mean of its divisors is an integer number (254909370771).

Almost surely, 2^509818741541 is an apocalyptic number.

It is an amenable number.

509818741541 is a deficient number, since it is larger than the sum of its proper divisors (1).

509818741541 is an equidigital number, since it uses as much as digits as its factorization.

509818741541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1612800, while the sum is 53.

The spelling of 509818741541 in words is "five hundred nine billion, eight hundred eighteen million, seven hundred forty-one thousand, five hundred forty-one".