108717772867 has 4 divisors (see below), whose sum is σ = 118601206776. Its totient is φ = 98834338960.

The previous prime is 108717772837. The next prime is 108717772873. The reversal of 108717772867 is 768277717801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 768277717801 = 11 ⋅69843428891.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-108717772867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (108717772837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4941716938 + ... + 4941716959.

It is an arithmetic number, because the mean of its divisors is an integer number (29650301694).

Almost surely, 2^108717772867 is an apocalyptic number.

108717772867 is a deficient number, since it is larger than the sum of its proper divisors (9883433909).

108717772867 is an equidigital number, since it uses as much as digits as its factorization.

108717772867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9883433908.

The product of its (nonzero) digits is 12907776, while the sum is 61.

The spelling of 108717772867 in words is "one hundred eight billion, seven hundred seventeen million, seven hundred seventy-two thousand, eight hundred sixty-seven".