5640944739 has 4 divisors (see below), whose sum is σ = 7521259656. Its totient is φ = 3760629824.

The previous prime is 5640944737. The next prime is 5640944767. The reversal of 5640944739 is 9374490465.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 5640944739 - 2¹ = 5640944737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 5640944691 and 5640944700.

It is not an unprimeable number, because it can be changed into a prime (5640944737) 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, 940157454 + ... + 940157459.

It is an arithmetic number, because the mean of its divisors is an integer number (1880314914).

Almost surely, 2^5640944739 is an apocalyptic number.

5640944739 is a deficient number, since it is larger than the sum of its proper divisors (1880314917).

5640944739 is a wasteful number, since it uses less digits than its factorization.

5640944739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1880314916.

The product of its (nonzero) digits is 3265920, while the sum is 51.

The square root of 5640944739 is about 75106.2230377750. The cubic root of 5640944739 is about 1780.1254739434.

The spelling of 5640944739 in words is "five billion, six hundred forty million, nine hundred forty-four thousand, seven hundred thirty-nine".