5645394205440 has 576 divisors, whose sum is σ = 19948846095360. Its totient is φ = 1349234196480.

The previous prime is 5645394205427. The next prime is 5645394205457. The reversal of 5645394205440 is 445024935465.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1013714976 + ... + 1013720544.

It is an arithmetic number, because the mean of its divisors is an integer number (34633413360).

Almost surely, 2^{5645394205440} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5645394205440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9974423047680).

5645394205440 is an abundant number, since it is smaller than the sum of its proper divisors (14303451889920).

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

5645394205440 is a wasteful number, since it uses less digits than its factorization.

5645394205440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5940 (or 5926 counting only the distinct ones).

The product of its (nonzero) digits is 10368000, while the sum is 51.

The spelling of 5645394205440 in words is "five trillion, six hundred forty-five billion, three hundred ninety-four million, two hundred five thousand, four hundred forty".