8381653840 has 120 divisors (see below), whose sum is σ = 22890142080. Its totient is φ = 2845672704.

The previous prime is 8381653801. The next prime is 8381653849. The reversal of 8381653840 is 483561838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8381653849) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 393381 + ... + 414139.

It is an arithmetic number, because the mean of its divisors is an integer number (190751184).

Almost surely, 2^8381653840 is an apocalyptic number.

8381653840 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 8381653840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11445071040).

8381653840 is an abundant number, since it is smaller than the sum of its proper divisors (14508488240).

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

8381653840 is a wasteful number, since it uses less digits than its factorization.

8381653840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20889 (or 20876 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 46.

The square root of 8381653840 is about 91551.3726822269. The cubic root of 8381653840 is about 2031.3117166384.

The spelling of 8381653840 in words is "eight billion, three hundred eighty-one million, six hundred fifty-three thousand, eight hundred forty".