5640023205 has 24 divisors (see below), whose sum is σ = 9787567608. Its totient is φ = 3004465536.

The previous prime is 5640023203. The next prime is 5640023209. The reversal of 5640023205 is 5023200465.

5640023205 is a `hidden beast` number, since 56 + 400 + 2 + 3 + 205 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 33907329 + 5606115876 = 5823^2 + 74874^2 .

It is not a de Polignac number, because 5640023205 - 2¹ = 5640023203 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5640023203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35082 + ... + 111851.

It is an arithmetic number, because the mean of its divisors is an integer number (407815317).

Almost surely, 2^5640023205 is an apocalyptic number.

It is an amenable number.

5640023205 is a deficient number, since it is larger than the sum of its proper divisors (4147544403).

5640023205 is a wasteful number, since it uses less digits than its factorization.

5640023205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147797 (or 147794 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 5640023205 is about 75100.0879160604. The cubic root of 5640023205 is about 1780.0285318197.

The spelling of 5640023205 in words is "five billion, six hundred forty million, twenty-three thousand, two hundred five".