6426640022446 has 64 divisors (see below), whose sum is σ = 11413359820800. Its totient is φ = 2655861050880.

The previous prime is 6426640022431. The next prime is 6426640022449. The reversal of 6426640022446 is 6442200466246.

It is a junction number, because it is equal to n+sod(n) for n = 6426640022396 and 6426640022405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6426640022449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 174348450 + ... + 174385306.

It is an arithmetic number, because the mean of its divisors is an integer number (178333747200).

Almost surely, 2^{6426640022446} is an apocalyptic number.

6426640022446 is a deficient number, since it is larger than the sum of its proper divisors (4986719798354).

6426640022446 is a wasteful number, since it uses less digits than its factorization.

6426640022446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38329.

The product of its (nonzero) digits is 2654208, while the sum is 46.

The spelling of 6426640022446 in words is "six trillion, four hundred twenty-six billion, six hundred forty million, twenty-two thousand, four hundred forty-six".