8461808172 has 18 divisors (see below), whose sum is σ = 21389570748. Its totient is φ = 2820602712.

The previous prime is 8461808171. The next prime is 8461808209. The reversal of 8461808172 is 2718081648.

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

It is not an unprimeable number, because it can be changed into a prime (8461808171) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 117525078 + ... + 117525149.

It is an arithmetic number, because the mean of its divisors is an integer number (1188309486).

Almost surely, 2^8461808172 is an apocalyptic number.

It is an amenable number.

8461808172 is an abundant number, since it is smaller than the sum of its proper divisors (12927762576).

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

8461808172 is a wasteful number, since it uses less digits than its factorization.

8461808172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235050237 (or 235050232 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 45.

The square root of 8461808172 is about 91988.0871200179. The cubic root of 8461808172 is about 2037.7663759127.

The spelling of 8461808172 in words is "eight billion, four hundred sixty-one million, eight hundred eight thousand, one hundred seventy-two".