6419547820 has 72 divisors (see below), whose sum is σ = 16604554176. Its totient is φ = 2071512576.

The previous prime is 6419547811. The next prime is 6419547881. The reversal of 6419547820 is 287459146.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 176004 + ... + 209323.

It is an arithmetic number, because the mean of its divisors is an integer number (230618808).

Almost surely, 2^6419547820 is an apocalyptic number.

It is an amenable number.

6419547820 is an abundant number, since it is smaller than the sum of its proper divisors (10185006356).

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

6419547820 is a wasteful number, since it uses less digits than its factorization.

6419547820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385367 (or 385358 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 46.

The square root of 6419547820 is about 80122.0807268508. The cubic root of 6419547820 is about 1858.5238818376.

The spelling of 6419547820 in words is "six billion, four hundred nineteen million, five hundred forty-seven thousand, eight hundred twenty".