8181015620000 has 120 divisors (see below), whose sum is σ = 20149889671296. Its totient is φ = 3268607456000.

The previous prime is 8181015619937. The next prime is 8181015620009. The reversal of 8181015620000 is 265101818.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (8181015620009) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 17023007 + ... + 17496993.

Almost surely, 2^{8181015620000} is an apocalyptic number.

8181015620000 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 8181015620000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10074944835648).

8181015620000 is an abundant number, since it is smaller than the sum of its proper divisors (11968874051296).

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

8181015620000 is an equidigital number, since it uses as much as digits as its factorization.

8181015620000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474880 (or 474857 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 32.

The spelling of 8181015620000 in words is "eight trillion, one hundred eighty-one billion, fifteen million, six hundred twenty thousand".