511185043489 has 2 divisors, whose sum is σ = 511185043490. Its totient is φ = 511185043488.

The previous prime is 511185043483. The next prime is 511185043517. The reversal of 511185043489 is 984340581115.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 409875246225 + 101309797264 = 640215^2 + 318292^2 .

It is a cyclic number.

It is not a de Polignac number, because 511185043489 - 2¹¹ = 511185041441 is a prime.

It is a super-2 number, since 2×511185043489² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (511185043483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255592521744 + 255592521745.

It is an arithmetic number, because the mean of its divisors is an integer number (255592521745).

Almost surely, 2^511185043489 is an apocalyptic number.

It is an amenable number.

511185043489 is a deficient number, since it is larger than the sum of its proper divisors (1).

511185043489 is an equidigital number, since it uses as much as digits as its factorization.

511185043489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 691200, while the sum is 49.

The spelling of 511185043489 in words is "five hundred eleven billion, one hundred eighty-five million, forty-three thousand, four hundred eighty-nine".