840465000172 has 48 divisors (see below), whose sum is σ = 1683891784960. Its totient is φ = 359565054912.

The previous prime is 840465000163. The next prime is 840465000173. The reversal of 840465000172 is 271000564048.

It is not an unprimeable number, because it can be changed into a prime (840465000173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56861479 + ... + 56876257.

Almost surely, 2^840465000172 is an apocalyptic number.

It is an amenable number.

840465000172 is an abundant number, since it is smaller than the sum of its proper divisors (843426784788).

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

840465000172 is a wasteful number, since it uses less digits than its factorization.

840465000172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18230 (or 18228 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 37.

The spelling of 840465000172 in words is "eight hundred forty billion, four hundred sixty-five million, one hundred seventy-two", and thus it is an aban number.