6545319912 has 128 divisors (see below), whose sum is σ = 18842419200. Its totient is φ = 2103019200.

The previous prime is 6545319883. The next prime is 6545319917. The reversal of 6545319912 is 2199135456.

6545319912 is a `hidden beast` number, since 6 + 5 + 453 + 199 + 1 + 2 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (6545319917) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1812813 + ... + 1816419.

It is an arithmetic number, because the mean of its divisors is an integer number (147206400).

Almost surely, 2^6545319912 is an apocalyptic number.

6545319912 is a gapful number since it is divisible by the number (62) 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 6545319912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9421209600).

6545319912 is an abundant number, since it is smaller than the sum of its proper divisors (12297099288).

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

6545319912 is a wasteful number, since it uses less digits than its factorization.

6545319912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3924 (or 3914 counting only the distinct ones).

The product of its digits is 291600, while the sum is 45.

The square root of 6545319912 is about 80903.1514342921. The cubic root of 6545319912 is about 1870.5828977755.

The spelling of 6545319912 in words is "six billion, five hundred forty-five million, three hundred nineteen thousand, nine hundred twelve".