117912581851 has 2 divisors, whose sum is σ = 117912581852. Its totient is φ = 117912581850.

The previous prime is 117912581767. The next prime is 117912581861. The reversal of 117912581851 is 158185219711.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 117912581851 - 2¹¹ = 117912579803 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 117912581795 and 117912581804.

It is not a weakly prime, because it can be changed into another prime (117912581861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58956290925 + 58956290926.

It is an arithmetic number, because the mean of its divisors is an integer number (58956290926).

Almost surely, 2^117912581851 is an apocalyptic number.

117912581851 is a deficient number, since it is larger than the sum of its proper divisors (1).

117912581851 is an equidigital number, since it uses as much as digits as its factorization.

117912581851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 201600, while the sum is 49.

The spelling of 117912581851 in words is "one hundred seventeen billion, nine hundred twelve million, five hundred eighty-one thousand, eight hundred fifty-one".