117777789617 has 2 divisors, whose sum is σ = 117777789618. Its totient is φ = 117777789616.

The previous prime is 117777789559. The next prime is 117777789631. The reversal of 117777789617 is 716987777711.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67130737216 + 50647052401 = 259096^2 + 225049^2 .

It is an emirp because it is prime and its reverse (716987777711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117777789617 - 2¹⁴ = 117777773233 is a prime.

It is not a weakly prime, because it can be changed into another prime (117777789637) 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, 58888894808 + 58888894809.

It is an arithmetic number, because the mean of its divisors is an integer number (58888894809).

Almost surely, 2^117777789617 is an apocalyptic number.

It is an amenable number.

117777789617 is a deficient number, since it is larger than the sum of its proper divisors (1).

117777789617 is an equidigital number, since it uses as much as digits as its factorization.

117777789617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50824368, while the sum is 68.

The spelling of 117777789617 in words is "one hundred seventeen billion, seven hundred seventy-seven million, seven hundred eighty-nine thousand, six hundred seventeen".