108509409855860 has 72 divisors (see below), whose sum is σ = 249719396199840. Its totient is φ = 39582301769088.

The previous prime is 108509409855851. The next prime is 108509409855881. The reversal of 108509409855860 is 68558904905801.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 193113290 + ... + 193674369.

It is an arithmetic number, because the mean of its divisors is an integer number (3468324947220).

Almost surely, 2^{108509409855860} is an apocalyptic number.

108509409855860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

108509409855860 is an abundant number, since it is smaller than the sum of its proper divisors (141209986343980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

108509409855860 is a wasteful number, since it uses less digits than its factorization.

108509409855860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386787777 (or 386787762 counting only the distinct ones).

The product of its (nonzero) digits is 124416000, while the sum is 68.

The spelling of 108509409855860 in words is "one hundred eight trillion, five hundred nine billion, four hundred nine million, eight hundred fifty-five thousand, eight hundred sixty".