6435336645 has 24 divisors (see below), whose sum is σ = 11161126392. Its totient is φ = 3430166400.

The previous prime is 6435336643. The next prime is 6435336673. The reversal of 6435336645 is 5466335346.

It can be written as a sum of positive squares in 4 ways, for example, as 564252516 + 5871084129 = 23754^2 + 76623^2 .

It is not a de Polignac number, because 6435336645 - 2¹ = 6435336643 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 6435336645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6435336643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37275 + ... + 119415.

It is an arithmetic number, because the mean of its divisors is an integer number (465046933).

Almost surely, 2^6435336645 is an apocalyptic number.

It is an amenable number.

6435336645 is a deficient number, since it is larger than the sum of its proper divisors (4725789747).

6435336645 is a wasteful number, since it uses less digits than its factorization.

6435336645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83893 (or 83890 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 45.

The square root of 6435336645 is about 80220.5500168130. The cubic root of 6435336645 is about 1860.0463091141.

The spelling of 6435336645 in words is "six billion, four hundred thirty-five million, three hundred thirty-six thousand, six hundred forty-five".