511005005509 has 2 divisors, whose sum is σ = 511005005510. Its totient is φ = 511005005508.

The previous prime is 511005005503. The next prime is 511005005513. The reversal of 511005005509 is 905500500115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 367442068900 + 143562936609 = 606170^2 + 378897^2 .

It is a cyclic number.

It is not a de Polignac number, because 511005005509 - 2⁵ = 511005005477 is a prime.

It is a super-2 number, since 2×511005005509² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (511005005503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255502502754 + 255502502755.

It is an arithmetic number, because the mean of its divisors is an integer number (255502502755).

Almost surely, 2^511005005509 is an apocalyptic number.

It is an amenable number.

511005005509 is a deficient number, since it is larger than the sum of its proper divisors (1).

511005005509 is an equidigital number, since it uses as much as digits as its factorization.

511005005509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5625, while the sum is 31.

The spelling of 511005005509 in words is "five hundred eleven billion, five million, five thousand, five hundred nine".