509156887049 has 2 divisors, whose sum is σ = 509156887050. Its totient is φ = 509156887048.

The previous prime is 509156887027. The next prime is 509156887067. The reversal of 509156887049 is 940788651905.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 481719283600 + 27437603449 = 694060^2 + 165643^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-509156887049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 509156886982 and 509156887000.

It is not a weakly prime, because it can be changed into another prime (509156847049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254578443524 + 254578443525.

It is an arithmetic number, because the mean of its divisors is an integer number (254578443525).

Almost surely, 2^509156887049 is an apocalyptic number.

It is an amenable number.

509156887049 is a deficient number, since it is larger than the sum of its proper divisors (1).

509156887049 is an equidigital number, since it uses as much as digits as its factorization.

509156887049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21772800, while the sum is 62.

The spelling of 509156887049 in words is "five hundred nine billion, one hundred fifty-six million, eight hundred eighty-seven thousand, forty-nine".