81100283707660 has 384 divisors, whose sum is σ = 212248388911104. Its totient is φ = 25399401431040.

The previous prime is 81100283707657. The next prime is 81100283707673. The reversal of 81100283707660 is 6670738200118.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 14200712205 + ... + 14200717915.

It is an arithmetic number, because the mean of its divisors is an integer number (552730179456).

Almost surely, 2^{81100283707660} 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 81100283707660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106124194455552).

81100283707660 is an abundant number, since it is smaller than the sum of its proper divisors (131148105203444).

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

81100283707660 is a wasteful number, since it uses less digits than its factorization.

81100283707660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6993 (or 6991 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 49.

The spelling of 81100283707660 in words is "eighty-one trillion, one hundred billion, two hundred eighty-three million, seven hundred seven thousand, six hundred sixty".