108509435172 has 18 divisors (see below), whose sum is σ = 274287738998. Its totient is φ = 36169811712.

The previous prime is 108509435161. The next prime is 108509435267. The reversal of 108509435172 is 271534905801.

108509435172 is a `hidden beast` number, since 10 + 85 + 0 + 9 + 43 + 517 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 73107507456 + 35401927716 = 270384^2 + 188154^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1507075453 + ... + 1507075524.

Almost surely, 2^108509435172 is an apocalyptic number.

108509435172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

108509435172 is an abundant number, since it is smaller than the sum of its proper divisors (165778303826).

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

108509435172 is a wasteful number, since it uses less digits than its factorization.

108509435172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3014150987 (or 3014150982 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The spelling of 108509435172 in words is "one hundred eight billion, five hundred nine million, four hundred thirty-five thousand, one hundred seventy-two".