5645566541 has 4 divisors (see below), whose sum is σ = 5670219900. Its totient is φ = 5620913184.

The previous prime is 5645566489. The next prime is 5645566543. The reversal of 5645566541 is 1456655465.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1456655465 = 5 ⋅291331093.

It can be written as a sum of positive squares in 2 ways, for example, as 5468010916 + 177555625 = 73946^2 + 13325^2 .

It is a cyclic number.

It is not a de Polignac number, because 5645566541 - 2⁶ = 5645566477 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 (5645566543) 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, 12326336 + ... + 12326793.

It is an arithmetic number, because the mean of its divisors is an integer number (1417554975).

Almost surely, 2^5645566541 is an apocalyptic number.

It is an amenable number.

5645566541 is a deficient number, since it is larger than the sum of its proper divisors (24653359).

5645566541 is a wasteful number, since it uses less digits than its factorization.

5645566541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24653358.

The product of its digits is 2160000, while the sum is 47.

The square root of 5645566541 is about 75136.9851737478. The cubic root of 5645566541 is about 1780.6115120034.

The spelling of 5645566541 in words is "five billion, six hundred forty-five million, five hundred sixty-six thousand, five hundred forty-one".