9949478649 has 32 divisors (see below), whose sum is σ = 15242895360. Its totient is φ = 5709153600.

The previous prime is 9949478647. The next prime is 9949478657. The reversal of 9949478649 is 9468749499.

It is not a de Polignac number, because 9949478649 - 2¹ = 9949478647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9949478641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1319839 + ... + 1327355.

It is an arithmetic number, because the mean of its divisors is an integer number (476340480).

Almost surely, 2^9949478649 is an apocalyptic number.

It is an amenable number.

9949478649 is a deficient number, since it is larger than the sum of its proper divisors (5293416711).

9949478649 is a wasteful number, since it uses less digits than its factorization.

9949478649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9661.

The product of its digits is 141087744, while the sum is 69.

The square root of 9949478649 is about 99747.0733856387. The cubic root of 9949478649 is about 2150.8003977920.

The spelling of 9949478649 in words is "nine billion, nine hundred forty-nine million, four hundred seventy-eight thousand, six hundred forty-nine".