82171467072 has 84 divisors (see below), whose sum is σ = 236089823476. Its totient is φ = 27325347840.

The previous prime is 82171467013. The next prime is 82171467127. The reversal of 82171467072 is 27076417128.

It can be written as a sum of positive squares in 2 ways, for example, as 38834220096 + 43337246976 = 197064^2 + 208176^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73068 + ... + 411924.

Almost surely, 2^82171467072 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 82171467072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118044911738).

82171467072 is an abundant number, since it is smaller than the sum of its proper divisors (153918356404).

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

82171467072 is a wasteful number, since it uses less digits than its factorization.

82171467072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339296 (or 339283 counting only the distinct ones).

The product of its (nonzero) digits is 263424, while the sum is 45.

The spelling of 82171467072 in words is "eighty-two billion, one hundred seventy-one million, four hundred sixty-seven thousand, seventy-two".