5440664437 has 4 divisors (see below), whose sum is σ = 5859177100. Its totient is φ = 5022151776.

The previous prime is 5440664401. The next prime is 5440664441. The reversal of 5440664437 is 7344660445.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 869011441 + 4571652996 = 29479^2 + 67614^2 .

It is a cyclic number.

It is not a de Polignac number, because 5440664437 - 2¹¹ = 5440662389 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5440664393 and 5440664402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5440664447) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 209256312 + ... + 209256337.

It is an arithmetic number, because the mean of its divisors is an integer number (1464794275).

Almost surely, 2^5440664437 is an apocalyptic number.

It is an amenable number.

5440664437 is a deficient number, since it is larger than the sum of its proper divisors (418512663).

5440664437 is a wasteful number, since it uses less digits than its factorization.

5440664437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418512662.

The product of its (nonzero) digits is 967680, while the sum is 43.

The square root of 5440664437 is about 73760.8597902709. The cubic root of 5440664437 is about 1758.8034692894.

The spelling of 5440664437 in words is "five billion, four hundred forty million, six hundred sixty-four thousand, four hundred thirty-seven".