511552261316191 has 2 divisors, whose sum is σ = 511552261316192. Its totient is φ = 511552261316190.

The previous prime is 511552261316051. The next prime is 511552261316197. The reversal of 511552261316191 is 191613162255115.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 511552261316191 - 2¹⁹ = 511552260791903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (511552261316197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255776130658095 + 255776130658096.

It is an arithmetic number, because the mean of its divisors is an integer number (255776130658096).

Almost surely, 2^{511552261316191} is an apocalyptic number.

511552261316191 is a deficient number, since it is larger than the sum of its proper divisors (1).

511552261316191 is an equidigital number, since it uses as much as digits as its factorization.

511552261316191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 486000, while the sum is 49.

The spelling of 511552261316191 in words is "five hundred eleven trillion, five hundred fifty-two billion, two hundred sixty-one million, three hundred sixteen thousand, one hundred ninety-one".