64240668040440 has 64 divisors (see below), whose sum is σ = 192727784714400. Its totient is φ = 17130330980352.

The previous prime is 64240668040427. The next prime is 64240668040499. The reversal of 64240668040440 is 4404086604246.

It is a self number, because there is not a number n which added to its sum of digits gives 64240668040440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4002817 + ... + 12020976.

Almost surely, 2^{64240668040440} is an apocalyptic number.

64240668040440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64240668040440 is an abundant number, since it is smaller than the sum of its proper divisors (128487116673960).

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

64240668040440 is a wasteful number, since it uses less digits than its factorization.

64240668040440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16057216 (or 16057212 counting only the distinct ones).

The product of its (nonzero) digits is 3538944, while the sum is 48.

The spelling of 64240668040440 in words is "sixty-four trillion, two hundred forty billion, six hundred sixty-eight million, forty thousand, four hundred forty".