5640723889 has 4 divisors (see below), whose sum is σ = 5793175924. Its totient is φ = 5488271856.

The previous prime is 5640723877. The next prime is 5640723911. The reversal of 5640723889 is 9883270465.

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 4873156864 + 767567025 = 69808^2 + 27705^2 .

It is a cyclic number.

It is not a de Polignac number, because 5640723889 - 2¹³ = 5640715697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5640723839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76225962 + ... + 76226035.

It is an arithmetic number, because the mean of its divisors is an integer number (1448293981).

Almost surely, 2^5640723889 is an apocalyptic number.

It is an amenable number.

5640723889 is a deficient number, since it is larger than the sum of its proper divisors (152452035).

5640723889 is a wasteful number, since it uses less digits than its factorization.

5640723889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152452034.

The product of its (nonzero) digits is 2903040, while the sum is 52.

The square root of 5640723889 is about 75104.7527723779. The cubic root of 5640723889 is about 1780.1022422650.

The spelling of 5640723889 in words is "five billion, six hundred forty million, seven hundred twenty-three thousand, eight hundred eighty-nine".