6429709649 has 16 divisors (see below), whose sum is σ = 7409741760. Its totient is φ = 5517792000.

The previous prime is 6429709631. The next prime is 6429709679. The reversal of 6429709649 is 9469079246.

It is a cyclic number.

It is not a de Polignac number, because 6429709649 - 2²⁰ = 6428661073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6429709594 and 6429709603.

It is not an unprimeable number, because it can be changed into a prime (6429709679) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3989 + ... + 113469.

It is an arithmetic number, because the mean of its divisors is an integer number (463108860).

Almost surely, 2^6429709649 is an apocalyptic number.

It is an amenable number.

6429709649 is a deficient number, since it is larger than the sum of its proper divisors (980032111).

6429709649 is a wasteful number, since it uses less digits than its factorization.

6429709649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109792.

The product of its (nonzero) digits is 5878656, while the sum is 56.

The square root of 6429709649 is about 80185.4703110233. The cubic root of 6429709649 is about 1859.5040155354.

The spelling of 6429709649 in words is "six billion, four hundred twenty-nine million, seven hundred nine thousand, six hundred forty-nine".