108909891798 has 32 divisors (see below), whose sum is σ = 223913590272. Its totient is φ = 35301672000.

The previous prime is 108909891707. The next prime is 108909891799. The reversal of 108909891798 is 897198909801.

It is a super-2 number, since 2×108909891798² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108909891799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1719978 + ... + 1782173.

It is an arithmetic number, because the mean of its divisors is an integer number (6997299696).

Almost surely, 2^108909891798 is an apocalyptic number.

108909891798 is an abundant number, since it is smaller than the sum of its proper divisors (115003698474).

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

108909891798 is a wasteful number, since it uses less digits than its factorization.

108909891798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3502300.

The product of its (nonzero) digits is 23514624, while the sum is 69.

The spelling of 108909891798 in words is "one hundred eight billion, nine hundred nine million, eight hundred ninety-one thousand, seven hundred ninety-eight".