117717771827 has 2 divisors, whose sum is σ = 117717771828. Its totient is φ = 117717771826.

The previous prime is 117717771791. The next prime is 117717771851. The reversal of 117717771827 is 728177717711.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 117717771827 - 2¹⁰ = 117717770803 is a prime.

It is not a weakly prime, because it can be changed into another prime (117717771427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58858885913 + 58858885914.

It is an arithmetic number, because the mean of its divisors is an integer number (58858885914).

Almost surely, 2^117717771827 is an apocalyptic number.

117717771827 is a deficient number, since it is larger than the sum of its proper divisors (1).

117717771827 is an equidigital number, since it uses as much as digits as its factorization.

117717771827 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1882384, while the sum is 56.

The spelling of 117717771827 in words is "one hundred seventeen billion, seven hundred seventeen million, seven hundred seventy-one thousand, eight hundred twenty-seven".