117717771851 has 2 divisors, whose sum is σ = 117717771852. Its totient is φ = 117717771850.

The previous prime is 117717771827. The next prime is 117717771859. The reversal of 117717771851 is 158177717711.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 117717771851 - 2³⁴ = 100537902667 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 117717771793 and 117717771802.

It is not a weakly prime, because it can be changed into another prime (117717771859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58858885925 + 58858885926.

It is an arithmetic number, because the mean of its divisors is an integer number (58858885926).

Almost surely, 2^117717771851 is an apocalyptic number.

117717771851 is a deficient number, since it is larger than the sum of its proper divisors (1).

117717771851 is an equidigital number, since it uses as much as digits as its factorization.

117717771851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 672280, while the sum is 53.

The spelling of 117717771851 in words is "one hundred seventeen billion, seven hundred seventeen million, seven hundred seventy-one thousand, eight hundred fifty-one".