5643865349840 has 40 divisors (see below), whose sum is σ = 13122174535560. Its totient is φ = 2257513865216.

The previous prime is 5643865349831. The next prime is 5643865349861. The reversal of 5643865349840 is 489435683465.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4627264576 + 5639238085264 = 68024^2 + 2374708^2 .

It is a tau number, because it is divible by the number of its divisors (40).

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, 5582876 + ... + 6515844.

It is an arithmetic number, because the mean of its divisors is an integer number (328054363389).

Almost surely, 2^{5643865349840} is an apocalyptic number.

It is an amenable number.

5643865349840 is an abundant number, since it is smaller than the sum of its proper divisors (7478309185720).

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

5643865349840 is a wasteful number, since it uses less digits than its factorization.

5643865349840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008599 (or 1008593 counting only the distinct ones).

The product of its (nonzero) digits is 298598400, while the sum is 65.

The spelling of 5643865349840 in words is "five trillion, six hundred forty-three billion, eight hundred sixty-five million, three hundred forty-nine thousand, eight hundred forty".