6378579446400 has 960 divisors, whose sum is σ = 26950484880000. Its totient is φ = 1455279022080.

The previous prime is 6378579446347. The next prime is 6378579446411. The reversal of 6378579446400 is 46449758736.

It is a happy number.

6378579446400 is a `hidden beast` number, since 6 + 3 + 7 + 85 + 7 + 94 + 464 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (960).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 1086822666 + ... + 1086828534.

It is an arithmetic number, because the mean of its divisors is an integer number (28073421750).

Almost surely, 2^{6378579446400} is an apocalyptic number.

6378579446400 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 6378579446400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13475242440000).

6378579446400 is an abundant number, since it is smaller than the sum of its proper divisors (20571905433600).

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

6378579446400 is a wasteful number, since it uses less digits than its factorization.

6378579446400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6511 (or 6485 counting only the distinct ones).

The product of its (nonzero) digits is 121927680, while the sum is 63.

The spelling of 6378579446400 in words is "six trillion, three hundred seventy-eight billion, five hundred seventy-nine million, four hundred forty-six thousand, four hundred".