84868865172 has 144 divisors (see below), whose sum is σ = 264145819392. Its totient is φ = 22373729280.

The previous prime is 84868865171. The next prime is 84868865183. The reversal of 84868865172 is 27156886848.

84868865172 is a `hidden beast` number, since 8 + 486 + 8 + 86 + 5 + 1 + 72 = 666.

It is a super-2 number, since 2×84868865172² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84868865171) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12022668 + ... + 12029724.

It is an arithmetic number, because the mean of its divisors is an integer number (1834345968).

Almost surely, 2^84868865172 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84868865172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132072909696).

84868865172 is an abundant number, since it is smaller than the sum of its proper divisors (179276954220).

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

84868865172 is a wasteful number, since it uses less digits than its factorization.

84868865172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10758 (or 10753 counting only the distinct ones).

The product of its digits is 41287680, while the sum is 63.

The spelling of 84868865172 in words is "eighty-four billion, eight hundred sixty-eight million, eight hundred sixty-five thousand, one hundred seventy-two".