5645345641 has 4 divisors (see below), whose sum is σ = 6079603012. Its totient is φ = 5211088272.

The previous prime is 5645345623. The next prime is 5645345663. The reversal of 5645345641 is 1465435465.

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 1311888400 + 4333457241 = 36220^2 + 65829^2 .

It is not a de Polignac number, because 5645345641 - 2⁹ = 5645345129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5645345621) 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, 217128666 + ... + 217128691.

It is an arithmetic number, because the mean of its divisors is an integer number (1519900753).

Almost surely, 2^5645345641 is an apocalyptic number.

It is an amenable number.

5645345641 is a deficient number, since it is larger than the sum of its proper divisors (434257371).

5645345641 is a wasteful number, since it uses less digits than its factorization.

5645345641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434257370.

The product of its digits is 864000, while the sum is 43.

The square root of 5645345641 is about 75135.5151775776. The cubic root of 5645345641 is about 1780.5882877494.

The spelling of 5645345641 in words is "five billion, six hundred forty-five million, three hundred forty-five thousand, six hundred forty-one".