117931778009 has 2 divisors, whose sum is σ = 117931778010. Its totient is φ = 117931778008.

The previous prime is 117931777991. The next prime is 117931778087. The reversal of 117931778009 is 900877139711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116688510409 + 1243267600 = 341597^2 + 35260^2 .

It is a cyclic number.

It is not a de Polignac number, because 117931778009 - 2³⁶ = 49212301273 is a prime.

It is not a weakly prime, because it can be changed into another prime (117931778309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58965889004 + 58965889005.

It is an arithmetic number, because the mean of its divisors is an integer number (58965889005).

Almost surely, 2^117931778009 is an apocalyptic number.

It is an amenable number.

117931778009 is a deficient number, since it is larger than the sum of its proper divisors (1).

117931778009 is an equidigital number, since it uses as much as digits as its factorization.

117931778009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 666792, while the sum is 53.

The spelling of 117931778009 in words is "one hundred seventeen billion, nine hundred thirty-one million, seven hundred seventy-eight thousand, nine".