3555738643 has 4 divisors (see below), whose sum is σ = 3560134680. Its totient is φ = 3551342608.

The previous prime is 3555738631. The next prime is 3555738701. The reversal of 3555738643 is 3468375553.

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

It is a cyclic number.

It is not a de Polignac number, because 3555738643 - 2¹⁷ = 3555607571 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3555738143) 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, 2196805 + ... + 2198422.

It is an arithmetic number, because the mean of its divisors is an integer number (890033670).

Almost surely, 2^3555738643 is an apocalyptic number.

3555738643 is a deficient number, since it is larger than the sum of its proper divisors (4396037).

3555738643 is an equidigital number, since it uses as much as digits as its factorization.

3555738643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4396036.

The product of its digits is 4536000, while the sum is 49.

The square root of 3555738643 is about 59630.0146151248. The cubic root of 3555738643 is about 1526.3118541388.

The spelling of 3555738643 in words is "three billion, five hundred fifty-five million, seven hundred thirty-eight thousand, six hundred forty-three".