3645868041 has 18 divisors (see below), whose sum is σ = 5279905098. Its totient is φ = 2424293280.

The previous prime is 3645868033. The next prime is 3645868087. The reversal of 3645868041 is 1408685463.

3645868041 is a `hidden beast` number, since 3 + 64 + 586 + 8 + 0 + 4 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3015657225 + 630210816 = 54915^2 + 25104^2 .

It is not a de Polignac number, because 3645868041 - 2³ = 3645868033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3645868021) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2461021 + ... + 2462501.

It is an arithmetic number, because the mean of its divisors is an integer number (293328061).

Almost surely, 2^3645868041 is an apocalyptic number.

It is an amenable number.

3645868041 is a deficient number, since it is larger than the sum of its proper divisors (1634037057).

3645868041 is an equidigital number, since it uses as much as digits as its factorization.

3645868041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2533 (or 2007 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The square root of 3645868041 is about 60381.0238485569. The cubic root of 3645868041 is about 1539.1005093273.

The spelling of 3645868041 in words is "three billion, six hundred forty-five million, eight hundred sixty-eight thousand, forty-one".