5640440366 has 16 divisors (see below), whose sum is σ = 9232973568. Its totient is φ = 2562958200.

The previous prime is 5640440363. The next prime is 5640440401. The reversal of 5640440366 is 6630440465.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5640440363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24101 + ... + 108911.

It is an arithmetic number, because the mean of its divisors is an integer number (577060848).

Almost surely, 2^5640440366 is an apocalyptic number.

5640440366 is a deficient number, since it is larger than the sum of its proper divisors (3592533202).

5640440366 is a wasteful number, since it uses less digits than its factorization.

5640440366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87847.

The product of its (nonzero) digits is 207360, while the sum is 38.

The square root of 5640440366 is about 75102.8652316275. The cubic root of 5640440366 is about 1780.0724169923.

Subtracting 5640440366 from its reverse (6630440465), we obtain a palindrome (990000099).

The spelling of 5640440366 in words is "five billion, six hundred forty million, four hundred forty thousand, three hundred sixty-six".