6546147840 has 480 divisors, whose sum is σ = 24934029120. Its totient is φ = 1640300544.

The previous prime is 6546147821. The next prime is 6546147851. The reversal of 6546147840 is 487416456.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10575051 + ... + 10575669.

It is an arithmetic number, because the mean of its divisors is an integer number (51945894).

Almost surely, 2^6546147840 is an apocalyptic number.

6546147840 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 6546147840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12467014560).

6546147840 is an abundant number, since it is smaller than the sum of its proper divisors (18387881280).

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

6546147840 is an equidigital number, since it uses as much as digits as its factorization.

6546147840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674 (or 646 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The square root of 6546147840 is about 80908.2680571028. The cubic root of 6546147840 is about 1870.6617654592.

The spelling of 6546147840 in words is "six billion, five hundred forty-six million, one hundred forty-seven thousand, eight hundred forty".