864108581117 has 2 divisors, whose sum is σ = 864108581118. Its totient is φ = 864108581116.

The previous prime is 864108581111. The next prime is 864108581177. The reversal of 864108581117 is 711185801468.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 809317943641 + 54790637476 = 899621^2 + 234074^2 .

It is a cyclic number.

It is not a de Polignac number, because 864108581117 - 2¹² = 864108577021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (864108581111) 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 as a sum of consecutive naturals, namely, 432054290558 + 432054290559.

It is an arithmetic number, because the mean of its divisors is an integer number (432054290559).

Almost surely, 2^864108581117 is an apocalyptic number.

It is an amenable number.

864108581117 is a deficient number, since it is larger than the sum of its proper divisors (1).

864108581117 is an equidigital number, since it uses as much as digits as its factorization.

864108581117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 430080, while the sum is 50.

The spelling of 864108581117 in words is "eight hundred sixty-four billion, one hundred eight million, five hundred eighty-one thousand, one hundred seventeen".