63134742721 has 2 divisors, whose sum is σ = 63134742722. Its totient is φ = 63134742720.

The previous prime is 63134742703. The next prime is 63134742779. The reversal of 63134742721 is 12724743136.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60240302721 + 2894440000 = 245439^2 + 53800^2 .

It is a cyclic number.

It is not a de Polignac number, because 63134742721 - 2¹¹ = 63134740673 is a prime.

It is not a weakly prime, because it can be changed into another prime (63134742221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31567371360 + 31567371361.

It is an arithmetic number, because the mean of its divisors is an integer number (31567371361).

Almost surely, 2^63134742721 is an apocalyptic number.

It is an amenable number.

63134742721 is a deficient number, since it is larger than the sum of its proper divisors (1).

63134742721 is an equidigital number, since it uses as much as digits as its factorization.

63134742721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 40.

The spelling of 63134742721 in words is "sixty-three billion, one hundred thirty-four million, seven hundred forty-two thousand, seven hundred twenty-one".