6405619968000 has 3456 divisors, whose sum is σ = 28205017102080. Its totient is φ = 1445216256000.

The previous prime is 6405619967899. The next prime is 6405619968001. The reversal of 6405619968000 is 8699165046.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (3456).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6405619968001) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 173124863982 + ... + 173124864018.

It is an arithmetic number, because the mean of its divisors is an integer number (8161173930).

Almost surely, 2^{6405619968000} is an apocalyptic number.

6405619968000 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 6405619968000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14102508551040).

6405619968000 is an abundant number, since it is smaller than the sum of its proper divisors (21799397134080).

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

6405619968000 is a wasteful number, since it uses less digits than its factorization.

6405619968000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134 (or 81 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 54.

The spelling of 6405619968000 in words is "six trillion, four hundred five billion, six hundred nineteen million, nine hundred sixty-eight thousand".