109208812867 has 48 divisors (see below), whose sum is σ = 141989518944. Its totient is φ = 83026944000.

The previous prime is 109208812859. The next prime is 109208812891. The reversal of 109208812867 is 768218802901.

It is a happy number.

It is not a de Polignac number, because 109208812867 - 2³ = 109208812859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (109208812837) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5160067 + ... + 5181187.

It is an arithmetic number, because the mean of its divisors is an integer number (2958114978).

Almost surely, 2^109208812867 is an apocalyptic number.

109208812867 is a deficient number, since it is larger than the sum of its proper divisors (32780706077).

109208812867 is a wasteful number, since it uses less digits than its factorization.

109208812867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21380 (or 21373 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 52.

The spelling of 109208812867 in words is "one hundred nine billion, two hundred eight million, eight hundred twelve thousand, eight hundred sixty-seven".