6535199872 has 64 divisors (see below), whose sum is σ = 13750783200. Its totient is φ = 3085185024.

The previous prime is 6535199843. The next prime is 6535199873. The reversal of 6535199872 is 2789915356.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (6535199873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 742248 + ... + 751000.

Almost surely, 2^6535199872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6535199872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6875391600).

6535199872 is an abundant number, since it is smaller than the sum of its proper divisors (7215583328).

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

6535199872 is a wasteful number, since it uses less digits than its factorization.

6535199872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9093 (or 9081 counting only the distinct ones).

The product of its digits is 4082400, while the sum is 55.

The square root of 6535199872 is about 80840.5830755815. The cubic root of 6535199872 is about 1869.6183338435.

The spelling of 6535199872 in words is "six billion, five hundred thirty-five million, one hundred ninety-nine thousand, eight hundred seventy-two".