863664359717481 has 16 divisors (see below), whose sum is σ = 1385326291276800. Its totient is φ = 467547623305488.

The previous prime is 863664359717407. The next prime is 863664359717521. The reversal of 863664359717481 is 184717953466368.

It is not a de Polignac number, because 863664359717481 - 2⁹ = 863664359716969 is a prime.

It is a super-2 number, since 2×863664359717481² (a number of 31 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 863664359717397 and 863664359717406.

It is not an unprimeable number, because it can be changed into a prime (863664359717981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1082286164661 + ... + 1082286165458.

It is an arithmetic number, because the mean of its divisors is an integer number (86582893204800).

Almost surely, 2^{863664359717481} is an apocalyptic number.

It is an amenable number.

863664359717481 is a deficient number, since it is larger than the sum of its proper divisors (521661931559319).

863664359717481 is a wasteful number, since it uses less digits than its factorization.

863664359717481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2164572330148.

The product of its digits is 4389396480, while the sum is 78.

The spelling of 863664359717481 in words is "eight hundred sixty-three trillion, six hundred sixty-four billion, three hundred fifty-nine million, seven hundred seventeen thousand, four hundred eighty-one".