6105605021 has 4 divisors (see below), whose sum is σ = 6108839100. Its totient is φ = 6102370944.

The previous prime is 6105604993. The next prime is 6105605041. The reversal of 6105605021 is 1205065016.

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 4197225796 + 1908379225 = 64786^2 + 43685^2 .

It is a cyclic number.

It is not a de Polignac number, because 6105605021 - 2¹⁸ = 6105342877 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6105605041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1614206 + ... + 1617983.

It is an arithmetic number, because the mean of its divisors is an integer number (1527209775).

Almost surely, 2^6105605021 is an apocalyptic number.

It is an amenable number.

6105605021 is a deficient number, since it is larger than the sum of its proper divisors (3234079).

6105605021 is a wasteful number, since it uses less digits than its factorization.

6105605021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3234078.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 6105605021 is about 78138.3709901864. The cubic root of 6105605021 is about 1827.7195978355.

The spelling of 6105605021 in words is "six billion, one hundred five million, six hundred five thousand, twenty-one".