440381565640 has 32 divisors (see below), whose sum is σ = 991085501880. Its totient is φ = 176112274432.

The previous prime is 440381565623. The next prime is 440381565683. The reversal of 440381565640 is 46565183044.

It can be written as a sum of positive squares in 4 ways, for example, as 400924510596 + 39457055044 = 633186^2 + 198638^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1083889 + ... + 1433728.

Almost surely, 2^440381565640 is an apocalyptic number.

440381565640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

440381565640 is an abundant number, since it is smaller than the sum of its proper divisors (550703936240).

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

440381565640 is a wasteful number, since it uses less digits than its factorization.

440381565640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2522001 (or 2521997 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 46.

The spelling of 440381565640 in words is "four hundred forty billion, three hundred eighty-one million, five hundred sixty-five thousand, six hundred forty".