1804768643 has 2 divisors, whose sum is σ = 1804768644. Its totient is φ = 1804768642.

The previous prime is 1804768619. The next prime is 1804768649. The reversal of 1804768643 is 3468674081.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1804768643 - 2⁶ = 1804768579 is a prime.

It is a super-2 number, since 2×1804768643² = 6514379709512122898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1804768649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 902384321 + 902384322.

It is an arithmetic number, because the mean of its divisors is an integer number (902384322).

Almost surely, 2^1804768643 is an apocalyptic number.

1804768643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1804768643 is an equidigital number, since it uses as much as digits as its factorization.

1804768643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 774144, while the sum is 47.

The square root of 1804768643 is about 42482.5686958781. The cubic root of 1804768643 is about 1217.5136685525.

The spelling of 1804768643 in words is "one billion, eight hundred four million, seven hundred sixty-eight thousand, six hundred forty-three".