4255665440 has 96 divisors (see below), whose sum is σ = 10884522096. Its totient is φ = 1563033600.

The previous prime is 4255665389. The next prime is 4255665443. The reversal of 4255665440 is 445665524.

It can be written as a sum of positive squares in 8 ways, for example, as 1281926416 + 2973739024 = 35804^2 + 54532^2 .

It is a super-2 number, since 2×4255665440² = 36221376674420787200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4255665443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 396140 + ... + 406740.

Almost surely, 2^4255665440 is an apocalyptic number.

4255665440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4255665440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5442261048).

4255665440 is an abundant number, since it is smaller than the sum of its proper divisors (6628856656).

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

4255665440 is a wasteful number, since it uses less digits than its factorization.

4255665440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10822 (or 10814 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 41.

The square root of 4255665440 is about 65235.4615220893. The cubic root of 4255665440 is about 1620.5253389457.

The spelling of 4255665440 in words is "four billion, two hundred fifty-five million, six hundred sixty-five thousand, four hundred forty".