5646778368 has 272 divisors, whose sum is σ = 18823892736. Its totient is φ = 1462763520.

The previous prime is 5646778363. The next prime is 5646778381. The reversal of 5646778368 is 8638776465.

It is a super-2 number, since 2×5646778368² = 63772211874625486848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5646778363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15138630 + ... + 15139002.

It is an arithmetic number, because the mean of its divisors is an integer number (69205488).

Almost surely, 2^5646778368 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 5646778368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9411946368).

5646778368 is an abundant number, since it is smaller than the sum of its proper divisors (13177114368).

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

5646778368 is an equidigital number, since it uses as much as digits as its factorization.

5646778368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426 (or 396 counting only the distinct ones).

The product of its digits is 40642560, while the sum is 60.

The square root of 5646778368 is about 75145.0488588570. The cubic root of 5646778368 is about 1780.7389062881.

The spelling of 5646778368 in words is "five billion, six hundred forty-six million, seven hundred seventy-eight thousand, three hundred sixty-eight".