5440642665 has 16 divisors (see below), whose sum is σ = 8717323200. Its totient is φ = 2897577792.

The previous prime is 5440642657. The next prime is 5440642679. The reversal of 5440642665 is 5662460445.

It is not a de Polignac number, because 5440642665 - 2³ = 5440642657 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 245155 + ... + 266424.

It is an arithmetic number, because the mean of its divisors is an integer number (544832700).

Almost surely, 2^5440642665 is an apocalyptic number.

It is an amenable number.

5440642665 is a deficient number, since it is larger than the sum of its proper divisors (3276680535).

5440642665 is a wasteful number, since it uses less digits than its factorization.

5440642665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512296.

The product of its (nonzero) digits is 691200, while the sum is 42.

The square root of 5440642665 is about 73760.7122050757. The cubic root of 5440642665 is about 1758.8011232083.

The spelling of 5440642665 in words is "five billion, four hundred forty million, six hundred forty-two thousand, six hundred sixty-five".