2168540000 has 120 divisors (see below), whose sum is σ = 5820518088. Its totient is φ = 788480000.

The previous prime is 2168539991. The next prime is 2168540039. The reversal of 2168540000 is 458612.

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, 215072 + ... + 224928.

Almost surely, 2^2168540000 is an apocalyptic number.

2168540000 is a gapful number since it is divisible by the number (20) 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 2168540000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2910259044).

2168540000 is an abundant number, since it is smaller than the sum of its proper divisors (3651978088).

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

2168540000 is an equidigital number, since it uses as much as digits as its factorization.

2168540000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9898 (or 9875 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 2168540000 is about 46567.5852927763. The cubic root of 2168540000 is about 1294.3621730448.

Adding to 2168540000 its reverse (458612), we get a palindrome (2168998612).

The spelling of 2168540000 in words is "two billion, one hundred sixty-eight million, five hundred forty thousand".