8181273705330 has 128 divisors (see below), whose sum is σ = 21743468845056. Its totient is φ = 1953587865600.

The previous prime is 8181273705287. The next prime is 8181273705419. The reversal of 8181273705330 is 335073721818.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 8181273705330.

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, 6148459 + ... + 7359761.

It is an arithmetic number, because the mean of its divisors is an integer number (169870850352).

Almost surely, 2^{8181273705330} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8181273705330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10871734422528).

8181273705330 is an abundant number, since it is smaller than the sum of its proper divisors (13562195139726).

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

8181273705330 is a wasteful number, since it uses less digits than its factorization.

8181273705330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1211632.

The product of its (nonzero) digits is 846720, while the sum is 48.

The spelling of 8181273705330 in words is "eight trillion, one hundred eighty-one billion, two hundred seventy-three million, seven hundred five thousand, three hundred thirty".