6390684919968 has 96 divisors (see below), whose sum is σ = 16850321550720. Its totient is φ = 2120753049600.

The previous prime is 6390684919963. The next prime is 6390684919991. The reversal of 6390684919968 is 8699194860936.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 6390684919893 and 6390684919902.

It is not an unprimeable number, because it can be changed into a prime (6390684919963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20558596 + ... + 20867132.

It is an arithmetic number, because the mean of its divisors is an integer number (175524182820).

Almost surely, 2^{6390684919968} is an apocalyptic number.

It is an amenable number.

6390684919968 is an abundant number, since it is smaller than the sum of its proper divisors (10459636630752).

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

6390684919968 is a wasteful number, since it uses less digits than its factorization.

6390684919968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309510 (or 309502 counting only the distinct ones).

The product of its (nonzero) digits is 1088391168, while the sum is 78.

The spelling of 6390684919968 in words is "six trillion, three hundred ninety billion, six hundred eighty-four million, nine hundred nineteen thousand, nine hundred sixty-eight".