3640644041 has 8 divisors (see below), whose sum is σ = 3710230920. Its totient is φ = 3571090432.

The previous prime is 3640644019. The next prime is 3640644047. The reversal of 3640644041 is 1404460463.

It can be written as a sum of positive squares in 4 ways, for example, as 702462016 + 2938182025 = 26504^2 + 54205^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3640644041 - 2²⁶ = 3573535177 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3640643989 and 3640644007.

It is not an unprimeable number, because it can be changed into a prime (3640644047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 423401 + ... + 431913.

It is an arithmetic number, because the mean of its divisors is an integer number (463778865).

Almost surely, 2^3640644041 is an apocalyptic number.

It is an amenable number.

3640644041 is a deficient number, since it is larger than the sum of its proper divisors (69586879).

3640644041 is an equidigital number, since it uses as much as digits as its factorization.

3640644041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16635.

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 3640644041 is about 60337.7497177348. The cubic root of 3640644041 is about 1538.3650553645.

The spelling of 3640644041 in words is "three billion, six hundred forty million, six hundred forty-four thousand, forty-one".