117856881017 has 2 divisors, whose sum is σ = 117856881018. Its totient is φ = 117856881016.

The previous prime is 117856881007. The next prime is 117856881029. The reversal of 117856881017 is 710188658711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88663399696 + 29193481321 = 297764^2 + 170861^2 .

It is a cyclic number.

It is not a de Polignac number, because 117856881017 - 2¹⁰ = 117856879993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 117856881017.

It is not a weakly prime, because it can be changed into another prime (117856881007) 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, 58928440508 + 58928440509.

It is an arithmetic number, because the mean of its divisors is an integer number (58928440509).

Almost surely, 2^117856881017 is an apocalyptic number.

It is an amenable number.

117856881017 is a deficient number, since it is larger than the sum of its proper divisors (1).

117856881017 is an equidigital number, since it uses as much as digits as its factorization.

117856881017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 752640, while the sum is 53.

The spelling of 117856881017 in words is "one hundred seventeen billion, eight hundred fifty-six million, eight hundred eighty-one thousand, seventeen".