63057667681 has 2 divisors, whose sum is σ = 63057667682. Its totient is φ = 63057667680.

The previous prime is 63057667669. The next prime is 63057667733. The reversal of 63057667681 is 18676675036.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38913480225 + 24144187456 = 197265^2 + 155384^2 .

It is a cyclic number.

It is not a de Polignac number, because 63057667681 - 2⁵ = 63057667649 is a prime.

It is a super-2 number, since 2×63057667681² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (63057667181) 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, 31528833840 + 31528833841.

It is an arithmetic number, because the mean of its divisors is an integer number (31528833841).

Almost surely, 2^63057667681 is an apocalyptic number.

It is an amenable number.

63057667681 is a deficient number, since it is larger than the sum of its proper divisors (1).

63057667681 is an equidigital number, since it uses as much as digits as its factorization.

63057667681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7620480, while the sum is 55.

The spelling of 63057667681 in words is "sixty-three billion, fifty-seven million, six hundred sixty-seven thousand, six hundred eighty-one".