6499169787 has 72 divisors (see below), whose sum is σ = 10055172400. Its totient is φ = 3730003200.

The previous prime is 6499169707. The next prime is 6499169837. The reversal of 6499169787 is 7879619946.

It is not a de Polignac number, because 6499169787 - 2¹¹ = 6499167739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6499169707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 18622089 + ... + 18622437.

Almost surely, 2^6499169787 is an apocalyptic number.

6499169787 is a deficient number, since it is larger than the sum of its proper divisors (3556002613).

6499169787 is a wasteful number, since it uses less digits than its factorization.

6499169787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493 (or 453 counting only the distinct ones).

The product of its digits is 41150592, while the sum is 66.

The square root of 6499169787 is about 80617.4285561131. The cubic root of 6499169787 is about 1866.1761191464.

The spelling of 6499169787 in words is "six billion, four hundred ninety-nine million, one hundred sixty-nine thousand, seven hundred eighty-seven".