63112582681 has 2 divisors, whose sum is σ = 63112582682. Its totient is φ = 63112582680.

The previous prime is 63112582679. The next prime is 63112582693. The reversal of 63112582681 is 18628521136.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52732233225 + 10380349456 = 229635^2 + 101884^2 .

It is a cyclic number.

It is not a de Polignac number, because 63112582681 - 2¹ = 63112582679 is a prime.

It is a super-2 number, since 2×63112582681² (a number of 22 digits) contains 22 as substring.

Together with 63112582679, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (63112582661) 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, 31556291340 + 31556291341.

It is an arithmetic number, because the mean of its divisors is an integer number (31556291341).

Almost surely, 2^63112582681 is an apocalyptic number.

It is an amenable number.

63112582681 is a deficient number, since it is larger than the sum of its proper divisors (1).

63112582681 is an equidigital number, since it uses as much as digits as its factorization.

63112582681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 138240, while the sum is 43.

The spelling of 63112582681 in words is "sixty-three billion, one hundred twelve million, five hundred eighty-two thousand, six hundred eighty-one".