6396919884684 has 672 divisors, whose sum is σ = 20294653317120. Its totient is φ = 1724094751104.

The previous prime is 6396919884683. The next prime is 6396919884703. The reversal of 6396919884684 is 4864889196936.

6396919884684 is a `hidden beast` number, since 6 + 3 + 9 + 69 + 1 + 98 + 8 + 468 + 4 = 666.

It is a super-2 number, since 2×6396919884684² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is not an unprimeable number, because it can be changed into a prime (6396919884683) by changing a digit.

It is a polite number, since it can be written in 223 ways as a sum of consecutive naturals, for example, 13697901019 + ... + 13697901485.

It is an arithmetic number, because the mean of its divisors is an integer number (30200376960).

Almost surely, 2^{6396919884684} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6396919884684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10147326658560).

6396919884684 is an abundant number, since it is smaller than the sum of its proper divisors (13897733432436).

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

6396919884684 is a wasteful number, since it uses less digits than its factorization.

6396919884684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861 (or 844 counting only the distinct ones).

The product of its digits is 3869835264, while the sum is 81.

The spelling of 6396919884684 in words is "six trillion, three hundred ninety-six billion, nine hundred nineteen million, eight hundred eighty-four thousand, six hundred eighty-four".