1643041355 has 8 divisors (see below), whose sum is σ = 1973309472. Its totient is φ = 1313326528.

The previous prime is 1643041307. The next prime is 1643041373. The reversal of 1643041355 is 5531403461.

1643041355 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

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 1643041355 - 2¹⁶ = 1642975819 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131759 + ... + 143688.

It is an arithmetic number, because the mean of its divisors is an integer number (246663684).

Almost surely, 2^1643041355 is an apocalyptic number.

1643041355 is a deficient number, since it is larger than the sum of its proper divisors (330268117).

1643041355 is a wasteful number, since it uses less digits than its factorization.

1643041355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276645.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 1643041355 is about 40534.4465239135. The cubic root of 1643041355 is about 1180.0022395342.

The spelling of 1643041355 in words is "one billion, six hundred forty-three million, forty-one thousand, three hundred fifty-five".