8168520000 has 140 divisors (see below), whose sum is σ = 27007429856. Its totient is φ = 2178240000.

The previous prime is 8168519981. The next prime is 8168520011. The reversal of 8168520000 is 258618.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a self number, because there is not a number n which added to its sum of digits gives 8168520000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 85965 + ... + 154035.

Almost surely, 2^8168520000 is an apocalyptic number.

8168520000 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 8168520000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13503714928).

8168520000 is an abundant number, since it is smaller than the sum of its proper divisors (18838909856).

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

8168520000 is an equidigital number, since it uses as much as digits as its factorization.

8168520000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68106 (or 68081 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 8168520000 is about 90379.8650142829. The cubic root of 8168520000 is about 2013.9458637512.

Adding to 8168520000 its reverse (258618), we get a palindrome (8168778618).

The spelling of 8168520000 in words is "eight billion, one hundred sixty-eight million, five hundred twenty thousand".