6436910689 has 12 divisors (see below), whose sum is σ = 7145347860. Its totient is φ = 5793788000.

The previous prime is 6436910677. The next prime is 6436910699. The reversal of 6436910689 is 9860196346.

It can be written as a sum of positive squares in 2 ways, for example, as 3098035600 + 3338875089 = 55660^2 + 57783^2 .

It is not a de Polignac number, because 6436910689 - 2²¹ = 6434813537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6436910659) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 251134 + ... + 275575.

It is an arithmetic number, because the mean of its divisors is an integer number (595445655).

Almost surely, 2^6436910689 is an apocalyptic number.

It is an amenable number.

6436910689 is a deficient number, since it is larger than the sum of its proper divisors (708437171).

6436910689 is a wasteful number, since it uses less digits than its factorization.

6436910689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526832 (or 526821 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 52.

The square root of 6436910689 is about 80230.3601450224. The cubic root of 6436910689 is about 1860.1979487366.

The spelling of 6436910689 in words is "six billion, four hundred thirty-six million, nine hundred ten thousand, six hundred eighty-nine".