63645373117 has 2 divisors, whose sum is σ = 63645373118. Its totient is φ = 63645373116.

The previous prime is 63645373061. The next prime is 63645373213. The reversal of 63645373117 is 71137354636.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39087662436 + 24557710681 = 197706^2 + 156709^2 .

It is a cyclic number.

It is not a de Polignac number, because 63645373117 - 2³¹ = 61497889469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63645373417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31822686558 + 31822686559.

It is an arithmetic number, because the mean of its divisors is an integer number (31822686559).

Almost surely, 2^63645373117 is an apocalyptic number.

It is an amenable number.

63645373117 is a deficient number, since it is larger than the sum of its proper divisors (1).

63645373117 is an equidigital number, since it uses as much as digits as its factorization.

63645373117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 952560, while the sum is 46.

The spelling of 63645373117 in words is "sixty-three billion, six hundred forty-five million, three hundred seventy-three thousand, one hundred seventeen".