81885502343360 has 448 divisors, whose sum is σ = 214157208545280. Its totient is φ = 29726352015360.

The previous prime is 81885502343357. The next prime is 81885502343371. The reversal of 81885502343360 is 6334320558818.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 81885502343296 and 81885502343305.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2879931704 + ... + 2879960136.

It is an arithmetic number, because the mean of its divisors is an integer number (478029483360).

Almost surely, 2^{81885502343360} is an apocalyptic number.

81885502343360 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81885502343360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107078604272640).

81885502343360 is an abundant number, since it is smaller than the sum of its proper divisors (132271706201920).

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

81885502343360 is a wasteful number, since it uses less digits than its factorization.

81885502343360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28736 (or 28726 counting only the distinct ones).

The product of its (nonzero) digits is 16588800, while the sum is 56.

The spelling of 81885502343360 in words is "eighty-one trillion, eight hundred eighty-five billion, five hundred two million, three hundred forty-three thousand, three hundred sixty".