3646244043405 has 12 divisors (see below), whose sum is σ = 6320156341980. Its totient is φ = 1944663489792.

The previous prime is 3646244043373. The next prime is 3646244043439. The reversal of 3646244043405 is 5043404426463.

3646244043405 is a `hidden beast` number, since 3 + 64 + 6 + 244 + 0 + 4 + 340 + 5 = 666.

3646244043405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1611632789001 + 2034611254404 = 1269501^2 + 1426398^2 .

It is not a de Polignac number, because 3646244043405 - 2⁵ = 3646244043373 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 81027645409 = 3646244043405 / (3 + 6 + 4 + 6 + 2 + 4 + 4 + 0 + 4 + 3 + 4 + 0 + 5).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40513822660 + ... + 40513822749.

It is an arithmetic number, because the mean of its divisors is an integer number (526679695165).

Almost surely, 2^{3646244043405} is an apocalyptic number.

It is an amenable number.

3646244043405 is a deficient number, since it is larger than the sum of its proper divisors (2673912298575).

3646244043405 is a wasteful number, since it uses less digits than its factorization.

3646244043405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81027645420 (or 81027645417 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 45.

Adding to 3646244043405 its reverse (5043404426463), we get a palindrome (8689648469868).

The spelling of 3646244043405 in words is "three trillion, six hundred forty-six billion, two hundred forty-four million, forty-three thousand, four hundred five".