63894181168549 has 2 divisors, whose sum is σ = 63894181168550. Its totient is φ = 63894181168548.

The previous prime is 63894181168537. The next prime is 63894181168589. The reversal of 63894181168549 is 94586118149836.

63894181168549 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59818700405025 + 4075480763524 = 7734255^2 + 2018782^2 .

It is a cyclic number.

It is not a de Polignac number, because 63894181168549 - 2¹³ = 63894181160357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63894181168589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31947090584274 + 31947090584275.

It is an arithmetic number, because the mean of its divisors is an integer number (31947090584275).

Almost surely, 2^{63894181168549} is an apocalyptic number.

It is an amenable number.

63894181168549 is a deficient number, since it is larger than the sum of its proper divisors (1).

63894181168549 is an equidigital number, since it uses as much as digits as its factorization.

63894181168549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 358318080, while the sum is 73.

The spelling of 63894181168549 in words is "sixty-three trillion, eight hundred ninety-four billion, one hundred eighty-one million, one hundred sixty-eight thousand, five hundred forty-nine".