6385787649 has 6 divisors (see below), whose sum is σ = 9223915506. Its totient is φ = 4257191760.

The previous prime is 6385787609. The next prime is 6385787657. The reversal of 6385787649 is 9467875836.

It can be written as a sum of positive squares in only one way, i.e., 6121497600 + 264290049 = 78240^2 + 16257^2 .

It is not a de Polignac number, because 6385787649 - 2¹⁷ = 6385656577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6385787609) 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 in 5 ways as a sum of consecutive naturals, for example, 354765972 + ... + 354765989.

It is an arithmetic number, because the mean of its divisors is an integer number (1537319251).

Almost surely, 2^6385787649 is an apocalyptic number.

It is an amenable number.

6385787649 is a deficient number, since it is larger than the sum of its proper divisors (2838127857).

6385787649 is a wasteful number, since it uses less digits than its factorization.

6385787649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709531967 (or 709531964 counting only the distinct ones).

The product of its digits is 60963840, while the sum is 63.

The square root of 6385787649 is about 79911.1234372287. The cubic root of 6385787649 is about 1855.2601838363.

The spelling of 6385787649 in words is "six billion, three hundred eighty-five million, seven hundred eighty-seven thousand, six hundred forty-nine".