6532645812 has 192 divisors, whose sum is σ = 19322634240. Its totient is φ = 1668643200.

The previous prime is 6532645789. The next prime is 6532645829. The reversal of 6532645812 is 2185462356.

It is a super-2 number, since 2×6532645812² = 85350922610082278688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

Its product of digits (345600) is a multiple of the sum of its prime divisors (640).

It is a congruent number.

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 63 ways as a sum of consecutive naturals, for example, 21005137 + ... + 21005447.

It is an arithmetic number, because the mean of its divisors is an integer number (100638720).

Almost surely, 2^6532645812 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 6532645812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9661317120).

6532645812 is an abundant number, since it is smaller than the sum of its proper divisors (12789988428).

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

6532645812 is a wasteful number, since it uses less digits than its factorization.

6532645812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642 (or 640 counting only the distinct ones).

The product of its digits is 345600, while the sum is 42.

The square root of 6532645812 is about 80824.7846393667. The cubic root of 6532645812 is about 1869.3747432523.

The spelling of 6532645812 in words is "six billion, five hundred thirty-two million, six hundred forty-five thousand, eight hundred twelve".