81328088060 has 96 divisors (see below), whose sum is σ = 181741916160. Its totient is φ = 30464640000.

The previous prime is 81328088027. The next prime is 81328088063. The reversal of 81328088060 is 6088082318.

It is a super-2 number, since 2×81328088060² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81328088063) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 108292685 + ... + 108293435.

It is an arithmetic number, because the mean of its divisors is an integer number (1893144960).

Almost surely, 2^81328088060 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 81328088060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90870958080).

81328088060 is an abundant number, since it is smaller than the sum of its proper divisors (100413828100).

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

81328088060 is a wasteful number, since it uses less digits than its factorization.

81328088060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1947 (or 1945 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 44.

The spelling of 81328088060 in words is "eighty-one billion, three hundred twenty-eight million, eighty-eight thousand, sixty".