511323533501987 has 2 divisors, whose sum is σ = 511323533501988. Its totient is φ = 511323533501986.

The previous prime is 511323533501953. The next prime is 511323533502007. The reversal of 511323533501987 is 789105335323115.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 511323533501987 - 2¹⁰ = 511323533500963 is a prime.

It is a super-2 number, since 2×511323533501987² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (511323533506987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255661766750993 + 255661766750994.

It is an arithmetic number, because the mean of its divisors is an integer number (255661766750994).

Almost surely, 2^{511323533501987} is an apocalyptic number.

511323533501987 is a deficient number, since it is larger than the sum of its proper divisors (1).

511323533501987 is an equidigital number, since it uses as much as digits as its factorization.

511323533501987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10206000, while the sum is 56.

The spelling of 511323533501987 in words is "five hundred eleven trillion, three hundred twenty-three billion, five hundred thirty-three million, five hundred one thousand, nine hundred eighty-seven".