3640650565441 has 4 divisors (see below), whose sum is σ = 3640654383300. Its totient is φ = 3640646747584.

The previous prime is 3640650565439. The next prime is 3640650565457. The reversal of 3640650565441 is 1445650560463.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 3613531063041 + 27119502400 = 1900929^2 + 164680^2 .

It is a cyclic number.

It is not a de Polignac number, because 3640650565441 - 2¹ = 3640650565439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3640650565411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 867525 + ... + 2834413.

It is an arithmetic number, because the mean of its divisors is an integer number (910163595825).

Almost surely, 2^{3640650565441} is an apocalyptic number.

It is an amenable number.

3640650565441 is a deficient number, since it is larger than the sum of its proper divisors (3817859).

3640650565441 is a wasteful number, since it uses less digits than its factorization.

3640650565441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3817858.

The product of its (nonzero) digits is 5184000, while the sum is 49.

The spelling of 3640650565441 in words is "three trillion, six hundred forty billion, six hundred fifty million, five hundred sixty-five thousand, four hundred forty-one".