1105643641 has 4 divisors (see below), whose sum is σ = 1115428212. Its totient is φ = 1095859072.

The previous prime is 1105643629. The next prime is 1105643677. The reversal of 1105643641 is 1463465011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 399200400 + 706443241 = 19980^2 + 26579^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1105643641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1105643621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4892116 + ... + 4892341.

It is an arithmetic number, because the mean of its divisors is an integer number (278857053).

Almost surely, 2^1105643641 is an apocalyptic number.

It is an amenable number.

1105643641 is a deficient number, since it is larger than the sum of its proper divisors (9784571).

1105643641 is an equidigital number, since it uses as much as digits as its factorization.

1105643641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9784570.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 1105643641 is about 33251.2201430263. The cubic root of 1105643641 is about 1034.0425043666.

The spelling of 1105643641 in words is "one billion, one hundred five million, six hundred forty-three thousand, six hundred forty-one".