511789987073 has 2 divisors, whose sum is σ = 511789987074. Its totient is φ = 511789987072.

The previous prime is 511789987043. The next prime is 511789987141. The reversal of 511789987073 is 370789987115.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 488297681089 + 23492305984 = 698783^2 + 153272^2 .

It is a cyclic number.

It is not a de Polignac number, because 511789987073 - 2⁸ = 511789986817 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (511789987013) 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, 255894993536 + 255894993537.

It is an arithmetic number, because the mean of its divisors is an integer number (255894993537).

Almost surely, 2^511789987073 is an apocalyptic number.

It is an amenable number.

511789987073 is a deficient number, since it is larger than the sum of its proper divisors (1).

511789987073 is an equidigital number, since it uses as much as digits as its factorization.

511789987073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26671680, while the sum is 65.

The spelling of 511789987073 in words is "five hundred eleven billion, seven hundred eighty-nine million, nine hundred eighty-seven thousand, seventy-three".