64642444000000 has 126 divisors (see below), whose sum is σ = 161288418528692. Its totient is φ = 25856976000000.

The previous prime is 64642443999949. The next prime is 64642444000159. The reversal of 64642444000000 is 44424646.

It is a self number, because there is not a number n which added to its sum of digits gives 64642444000000.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 4080306 + ... + 12080305.

Almost surely, 2^{64642444000000} is an apocalyptic number.

It is an amenable number.

64642444000000 is an abundant number, since it is smaller than the sum of its proper divisors (96645974528692).

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

64642444000000 is an frugal number, since it uses more digits than its factorization.

64642444000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16160657 (or 16160618 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 34.

Adding to 64642444000000 its reverse (44424646), we get a palindrome (64642488424646).

The spelling of 64642444000000 in words is "sixty-four trillion, six hundred forty-two billion, four hundred forty-four million", and thus it is an aban number.