6436911849 has 4 divisors (see below), whose sum is σ = 8582549136. Its totient is φ = 4291274564.

The previous prime is 6436911839. The next prime is 6436911853. The reversal of 6436911849 is 9481196346.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6436911849 - 2⁹ = 6436911337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6436911839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1072818639 + ... + 1072818644.

It is an arithmetic number, because the mean of its divisors is an integer number (2145637284).

Almost surely, 2^6436911849 is an apocalyptic number.

It is an amenable number.

6436911849 is a deficient number, since it is larger than the sum of its proper divisors (2145637287).

6436911849 is a wasteful number, since it uses less digits than its factorization.

6436911849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2145637286.

The product of its digits is 1119744, while the sum is 51.

The square root of 6436911849 is about 80230.3673742056. The cubic root of 6436911849 is about 1860.1980604791.

The spelling of 6436911849 in words is "six billion, four hundred thirty-six million, nine hundred eleven thousand, eight hundred forty-nine".