864168087122 has 18 divisors (see below), whose sum is σ = 1305920927493. Its totient is φ = 428884813584.

The previous prime is 864168087089. The next prime is 864168087127. The reversal of 864168087122 is 221780861468.

It can be written as a sum of positive squares in 2 ways, for example, as 554877499801 + 309290587321 = 744901^2 + 556139^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=657331.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (864168087127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 182735654 + ... + 182740382.

Almost surely, 2^864168087122 is an apocalyptic number.

864168087122 is a deficient number, since it is larger than the sum of its proper divisors (441752840371).

864168087122 is an frugal number, since it uses more digits than its factorization.

864168087122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9738 (or 4870 counting only the distinct ones).

The product of its (nonzero) digits is 2064384, while the sum is 53.

The spelling of 864168087122 in words is "eight hundred sixty-four billion, one hundred sixty-eight million, eighty-seven thousand, one hundred twenty-two".