6436949537 has 2 divisors, whose sum is σ = 6436949538. Its totient is φ = 6436949536.

The previous prime is 6436949527. The next prime is 6436949551. The reversal of 6436949537 is 7359496346.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4934922001 + 1502027536 = 70249^2 + 38756^2 .

It is a cyclic number.

It is not a de Polignac number, because 6436949537 - 2¹⁸ = 6436687393 is a prime.

It is not a weakly prime, because it can be changed into another prime (6436949507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3218474768 + 3218474769.

It is an arithmetic number, because the mean of its divisors is an integer number (3218474769).

Almost surely, 2^6436949537 is an apocalyptic number.

It is an amenable number.

6436949537 is a deficient number, since it is larger than the sum of its proper divisors (1).

6436949537 is an equidigital number, since it uses as much as digits as its factorization.

6436949537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14696640, while the sum is 56.

The square root of 6436949537 is about 80230.6022475215. The cubic root of 6436949537 is about 1860.2016909471.

The spelling of 6436949537 in words is "six billion, four hundred thirty-six million, nine hundred forty-nine thousand, five hundred thirty-seven".