5653378566 has 96 divisors (see below), whose sum is σ = 13719813120. Its totient is φ = 1667952000.

The previous prime is 5653378559. The next prime is 5653378567. The reversal of 5653378566 is 6658733565.

5653378566 is a `hidden beast` number, since 5 + 6 + 5 + 3 + 3 + 78 + 566 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5653378567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1139391 + ... + 1144341.

It is an arithmetic number, because the mean of its divisors is an integer number (142914720).

Almost surely, 2^5653378566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5653378566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6859906560).

5653378566 is an abundant number, since it is smaller than the sum of its proper divisors (8066434554).

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

5653378566 is a wasteful number, since it uses less digits than its factorization.

5653378566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5122 (or 5119 counting only the distinct ones).

The product of its digits is 13608000, while the sum is 54.

The square root of 5653378566 is about 75188.9524198868. The cubic root of 5653378566 is about 1781.4324376168.

The spelling of 5653378566 in words is "five billion, six hundred fifty-three million, three hundred seventy-eight thousand, five hundred sixty-six".