6533865000 has 800 divisors, whose sum is σ = 26433819720. Its totient is φ = 1492992000.

The previous prime is 6533864999. The next prime is 6533865029. The reversal of 6533865000 is 5683356.

It can be written as a sum of positive squares in 20 ways, for example, as 2648337444 + 3885527556 = 51462^2 + 62334^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 199 ways as a sum of consecutive naturals, for example, 89504964 + ... + 89505036.

Almost surely, 2^6533865000 is an apocalyptic number.

6533865000 is a gapful number since it is divisible by the number (60) 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 6533865000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13216909860).

6533865000 is an abundant number, since it is smaller than the sum of its proper divisors (19899954720).

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

6533865000 is a wasteful number, since it uses less digits than its factorization.

6533865000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 6533865000 is about 80832.3264542101. The cubic root of 6533865000 is about 1869.4910298510.

The spelling of 6533865000 in words is "six billion, five hundred thirty-three million, eight hundred sixty-five thousand".