5640806399 has 8 divisors (see below), whose sum is σ = 5834944080. Its totient is φ = 5448862656.

The previous prime is 5640806387. The next prime is 5640806401. The reversal of 5640806399 is 9936080465.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5640806399 - 2¹⁶ = 5640740863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5640806299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 543254 + ... + 553539.

It is an arithmetic number, because the mean of its divisors is an integer number (729368010).

Almost surely, 2^5640806399 is an apocalyptic number.

5640806399 is a deficient number, since it is larger than the sum of its proper divisors (194137681).

5640806399 is a wasteful number, since it uses less digits than its factorization.

5640806399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1096969.

The product of its (nonzero) digits is 1399680, while the sum is 50.

The square root of 5640806399 is about 75105.3020698273. The cubic root of 5640806399 is about 1780.1109217373.

The spelling of 5640806399 in words is "five billion, six hundred forty million, eight hundred six thousand, three hundred ninety-nine".