63500585081 has 2 divisors, whose sum is σ = 63500585082. Its totient is φ = 63500585080.

The previous prime is 63500585053. The next prime is 63500585123. The reversal of 63500585081 is 18058500536.

63500585081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54037186681 + 9463398400 = 232459^2 + 97280^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63500585081 is a prime.

It is a super-2 number, since 2×63500585081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (63500587081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31750292540 + 31750292541.

It is an arithmetic number, because the mean of its divisors is an integer number (31750292541).

Almost surely, 2^63500585081 is an apocalyptic number.

It is an amenable number.

63500585081 is a deficient number, since it is larger than the sum of its proper divisors (1).

63500585081 is an equidigital number, since it uses as much as digits as its factorization.

63500585081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144000, while the sum is 41.

The spelling of 63500585081 in words is "sixty-three billion, five hundred million, five hundred eighty-five thousand, eighty-one".