9378566649 has 27 divisors (see below), whose sum is σ = 14305754853. Its totient is φ = 5919818904.

The previous prime is 9378566629. The next prime is 9378566651. The reversal of 9378566649 is 9466658739.

The square root of 9378566649 is 96843.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 9378566649 - 2⁷ = 9378566521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9378566629) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 5519202 + ... + 5520900.

Almost surely, 2^9378566649 is an apocalyptic number.

9378566649 is the 96843-rd square number.

9378566649 is the 48422-nd centered octagonal number.

It is an amenable number.

9378566649 is a deficient number, since it is larger than the sum of its proper divisors (4927188204).

9378566649 is an equidigital number, since it uses as much as digits as its factorization.

9378566649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3442 (or 1721 counting only the distinct ones).

The product of its digits is 58786560, while the sum is 63.

The cubic root of 9378566649 is about 2108.8490274203.

The spelling of 9378566649 in words is "nine billion, three hundred seventy-eight million, five hundred sixty-six thousand, six hundred forty-nine".