168109012240 has 40 divisors (see below), whose sum is σ = 420919106328. Its totient is φ = 62071019520.

The previous prime is 168109012237. The next prime is 168109012241. The reversal of 168109012240 is 42210901861.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 831284224 + 167277728016 = 28832^2 + 408996^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 168109012196 and 168109012205.

It is not an unprimeable number, because it can be changed into a prime (168109012241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80820601 + ... + 80822680.

Almost surely, 2^168109012240 is an apocalyptic number.

168109012240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168109012240 is an abundant number, since it is smaller than the sum of its proper divisors (252810094088).

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

168109012240 is a wasteful number, since it uses less digits than its factorization.

168109012240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161643307 (or 161643301 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The spelling of 168109012240 in words is "one hundred sixty-eight billion, one hundred nine million, twelve thousand, two hundred forty".