5565091913640 has 480 divisors, whose sum is σ = 22509072649800. Its totient is φ = 1228157199360.

The previous prime is 5565091913639. The next prime is 5565091913677. The reversal of 5565091913640 is 463191905655.

5565091913640 is a `hidden beast` number, since 5 + 5 + 6 + 509 + 1 + 91 + 3 + 6 + 40 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2846016236196 + 2719075677444 = 1687014^2 + 1648962^2 .

It is a super-2 number, since 2×5565091913640² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 3999670 + ... + 5208410.

Almost surely, 2^{5565091913640} 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 5565091913640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11254536324900).

5565091913640 is an abundant number, since it is smaller than the sum of its proper divisors (16943980736160).

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

5565091913640 is a wasteful number, since it uses less digits than its factorization.

5565091913640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1208807 (or 1208787 counting only the distinct ones).

The product of its (nonzero) digits is 4374000, while the sum is 54.

The spelling of 5565091913640 in words is "five trillion, five hundred sixty-five billion, ninety-one million, nine hundred thirteen thousand, six hundred forty".