63645630161 has 2 divisors, whose sum is σ = 63645630162. Its totient is φ = 63645630160.

The previous prime is 63645630157. The next prime is 63645630203. The reversal of 63645630161 is 16103654636.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40820161600 + 22825468561 = 202040^2 + 151081^2 .

It is a cyclic number.

It is not a de Polignac number, because 63645630161 - 2² = 63645630157 is a prime.

It is not a weakly prime, because it can be changed into another prime (63645632161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31822815080 + 31822815081.

It is an arithmetic number, because the mean of its divisors is an integer number (31822815081).

Almost surely, 2^63645630161 is an apocalyptic number.

It is an amenable number.

63645630161 is a deficient number, since it is larger than the sum of its proper divisors (1).

63645630161 is an equidigital number, since it uses as much as digits as its factorization.

63645630161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 41.

The spelling of 63645630161 in words is "sixty-three billion, six hundred forty-five million, six hundred thirty thousand, one hundred sixty-one".