6535859616 has 144 divisors (see below), whose sum is σ = 21835850400. Its totient is φ = 1828200960.

The previous prime is 6535859587. The next prime is 6535859641. The reversal of 6535859616 is 6169585356.

It is a happy number.

6535859616 is a `hidden beast` number, since 6 + 5 + 35 + 8 + 596 + 16 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 38166 + ... + 120533.

It is an arithmetic number, because the mean of its divisors is an integer number (151637850).

Almost surely, 2^6535859616 is an apocalyptic number.

6535859616 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

6535859616 is an abundant number, since it is smaller than the sum of its proper divisors (15299990784).

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

6535859616 is a wasteful number, since it uses less digits than its factorization.

6535859616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158739 (or 158728 counting only the distinct ones).

The product of its digits is 5832000, while the sum is 54.

The square root of 6535859616 is about 80844.6634973515. The cubic root of 6535859616 is about 1869.6812458685.

The spelling of 6535859616 in words is "six billion, five hundred thirty-five million, eight hundred fifty-nine thousand, six hundred sixteen".