6499899712 has 56 divisors (see below), whose sum is σ = 13021056000. Its totient is φ = 3219134976.

The previous prime is 6499899691. The next prime is 6499899761. The reversal of 6499899712 is 2179989946.

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4567033 + ... + 4568455.

Almost surely, 2^6499899712 is an apocalyptic number.

It is an amenable number.

6499899712 is an abundant number, since it is smaller than the sum of its proper divisors (6521156288).

6499899712 is a wasteful number, since it uses less digits than its factorization.

6499899712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2063 (or 2053 counting only the distinct ones).

The product of its digits is 17635968, while the sum is 64.

The square root of 6499899712 is about 80621.9555208133. The cubic root of 6499899712 is about 1866.2459802547.

The spelling of 6499899712 in words is "six billion, four hundred ninety-nine million, eight hundred ninety-nine thousand, seven hundred twelve".