63505490501 has 2 divisors, whose sum is σ = 63505490502. Its totient is φ = 63505490500.

The previous prime is 63505490491. The next prime is 63505490561. The reversal of 63505490501 is 10509450536.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59645850625 + 3859639876 = 244225^2 + 62126^2 .

It is a cyclic number.

It is not a de Polignac number, because 63505490501 - 2²² = 63501296197 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63505490561) 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, 31752745250 + 31752745251.

It is an arithmetic number, because the mean of its divisors is an integer number (31752745251).

Almost surely, 2^63505490501 is an apocalyptic number.

It is an amenable number.

63505490501 is a deficient number, since it is larger than the sum of its proper divisors (1).

63505490501 is an equidigital number, since it uses as much as digits as its factorization.

63505490501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81000, while the sum is 38.

The spelling of 63505490501 in words is "sixty-three billion, five hundred five million, four hundred ninety thousand, five hundred one".