6445435811 has 4 divisors (see below), whose sum is σ = 6824579112. Its totient is φ = 6066292512.

The previous prime is 6445435783. The next prime is 6445435819. The reversal of 6445435811 is 1185345446.

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

It is not a de Polignac number, because 6445435811 - 2¹⁸ = 6445173667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6445435819) 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, 189571625 + ... + 189571658.

It is an arithmetic number, because the mean of its divisors is an integer number (1706144778).

Almost surely, 2^6445435811 is an apocalyptic number.

6445435811 is a deficient number, since it is larger than the sum of its proper divisors (379143301).

6445435811 is a wasteful number, since it uses less digits than its factorization.

6445435811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379143300.

The product of its digits is 230400, while the sum is 41.

The square root of 6445435811 is about 80283.4715928503. The cubic root of 6445435811 is about 1861.0188093090.

The spelling of 6445435811 in words is "six billion, four hundred forty-five million, four hundred thirty-five thousand, eight hundred eleven".