63506511017 has 2 divisors, whose sum is σ = 63506511018. Its totient is φ = 63506511016.

The previous prime is 63506510959. The next prime is 63506511043. The reversal of 63506511017 is 71011560536.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49863336601 + 13643174416 = 223301^2 + 116804^2 .

It is a cyclic number.

It is not a de Polignac number, because 63506511017 - 2⁶ = 63506510953 is a prime.

It is not a weakly prime, because it can be changed into another prime (63506511217) 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, 31753255508 + 31753255509.

It is an arithmetic number, because the mean of its divisors is an integer number (31753255509).

Almost surely, 2^63506511017 is an apocalyptic number.

It is an amenable number.

63506511017 is a deficient number, since it is larger than the sum of its proper divisors (1).

63506511017 is an equidigital number, since it uses as much as digits as its factorization.

63506511017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18900, while the sum is 35.

The spelling of 63506511017 in words is "sixty-three billion, five hundred six million, five hundred eleven thousand, seventeen".