9638756449 has 16 divisors (see below), whose sum is σ = 11611964800. Its totient is φ = 7815844224.

The previous prime is 9638756417. The next prime is 9638756453. The reversal of 9638756449 is 9446578369.

It is a cyclic number.

It is not a de Polignac number, because 9638756449 - 2⁵ = 9638756417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9638756459) 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, 43189 + ... + 145405.

It is an arithmetic number, because the mean of its divisors is an integer number (725747800).

Almost surely, 2^9638756449 is an apocalyptic number.

It is an amenable number.

9638756449 is a deficient number, since it is larger than the sum of its proper divisors (1973208351).

9638756449 is a wasteful number, since it uses less digits than its factorization.

9638756449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102952.

The product of its digits is 39191040, while the sum is 61.

The square root of 9638756449 is about 98177.1686747993. The cubic root of 9638756449 is about 2128.1733587622.

The spelling of 9638756449 in words is "nine billion, six hundred thirty-eight million, seven hundred fifty-six thousand, four hundred forty-nine".