64854384856144 has 40 divisors (see below), whose sum is σ = 138621684722472. Its totient is φ = 29202724884480.

The previous prime is 64854384856111. The next prime is 64854384856159. The reversal of 64854384856144 is 44165848345846.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9844157251600 + 55010227604544 = 3137540^2 + 7416888^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3802429609 + ... + 3802446664.

Almost surely, 2^{64854384856144} is an apocalyptic number.

It is an amenable number.

64854384856144 is an abundant number, since it is smaller than the sum of its proper divisors (73767299866328).

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

64854384856144 is a wasteful number, since it uses less digits than its factorization.

64854384856144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7604876335 (or 7604876329 counting only the distinct ones).

The product of its digits is 1415577600, while the sum is 70.

The spelling of 64854384856144 in words is "sixty-four trillion, eight hundred fifty-four billion, three hundred eighty-four million, eight hundred fifty-six thousand, one hundred forty-four".