63081563161 has 2 divisors, whose sum is σ = 63081563162. Its totient is φ = 63081563160.

The previous prime is 63081563159. The next prime is 63081563173. The reversal of 63081563161 is 16136518036.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60734645136 + 2346918025 = 246444^2 + 48445^2 .

It is a cyclic number.

It is not a de Polignac number, because 63081563161 - 2¹ = 63081563159 is a prime.

It is a super-2 number, since 2×63081563161² (a number of 22 digits) contains 22 as substring.

Together with 63081563159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (63081563261) 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, 31540781580 + 31540781581.

It is an arithmetic number, because the mean of its divisors is an integer number (31540781581).

Almost surely, 2^63081563161 is an apocalyptic number.

It is an amenable number.

63081563161 is a deficient number, since it is larger than the sum of its proper divisors (1).

63081563161 is an equidigital number, since it uses as much as digits as its factorization.

63081563161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 40.

The spelling of 63081563161 in words is "sixty-three billion, eighty-one million, five hundred sixty-three thousand, one hundred sixty-one".