5640543365 has 4 divisors (see below), whose sum is σ = 6768652044. Its totient is φ = 4512434688.

The previous prime is 5640543353. The next prime is 5640543397. The reversal of 5640543365 is 5633450465.

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 832091716 + 4808451649 = 28846^2 + 69343^2 .

It is a cyclic number.

It is not a de Polignac number, because 5640543365 - 2¹² = 5640539269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 564054332 + ... + 564054341.

It is an arithmetic number, because the mean of its divisors is an integer number (1692163011).

Almost surely, 2^5640543365 is an apocalyptic number.

It is an amenable number.

5640543365 is a deficient number, since it is larger than the sum of its proper divisors (1128108679).

5640543365 is a wasteful number, since it uses less digits than its factorization.

5640543365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128108678.

The product of its (nonzero) digits is 648000, while the sum is 41.

The square root of 5640543365 is about 75103.5509480078. The cubic root of 5640543365 is about 1780.0832521134.

The spelling of 5640543365 in words is "five billion, six hundred forty million, five hundred forty-three thousand, three hundred sixty-five".