6436143645 has 32 divisors (see below), whose sum is σ = 10915015680. Its totient is φ = 3227304960.

The previous prime is 6436143643. The next prime is 6436143661. The reversal of 6436143645 is 5463416346.

It is not a de Polignac number, because 6436143645 - 2¹ = 6436143643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6436143597 and 6436143606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6436143643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 239971 + ... + 265439.

It is an arithmetic number, because the mean of its divisors is an integer number (341094240).

Almost surely, 2^6436143645 is an apocalyptic number.

It is an amenable number.

6436143645 is a deficient number, since it is larger than the sum of its proper divisors (4478872035).

6436143645 is a wasteful number, since it uses less digits than its factorization.

6436143645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26485.

The product of its digits is 622080, while the sum is 42.

The square root of 6436143645 is about 80225.5797423739. The cubic root of 6436143645 is about 1860.1240566464.

The spelling of 6436143645 in words is "six billion, four hundred thirty-six million, one hundred forty-three thousand, six hundred forty-five".