63936350081 has 2 divisors, whose sum is σ = 63936350082. Its totient is φ = 63936350080.

The previous prime is 63936350077. The next prime is 63936350171. The reversal of 63936350081 is 18005363936.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36020623681 + 27915726400 = 189791^2 + 167080^2 .

It is a cyclic number.

It is not a de Polignac number, because 63936350081 - 2² = 63936350077 is a prime.

It is a super-2 number, since 2×63936350081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (63936350021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31968175040 + 31968175041.

It is an arithmetic number, because the mean of its divisors is an integer number (31968175041).

Almost surely, 2^63936350081 is an apocalyptic number.

It is an amenable number.

63936350081 is a deficient number, since it is larger than the sum of its proper divisors (1).

63936350081 is an equidigital number, since it uses as much as digits as its factorization.

63936350081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 349920, while the sum is 44.

The spelling of 63936350081 in words is "sixty-three billion, nine hundred thirty-six million, three hundred fifty thousand, eighty-one".