9436638648 has 64 divisors (see below), whose sum is σ = 24855033600. Its totient is φ = 2977378560.

The previous prime is 9436638637. The next prime is 9436638649. The reversal of 9436638648 is 8468366349.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9436638649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 549228 + ... + 566148.

It is an arithmetic number, because the mean of its divisors is an integer number (388359900).

Almost surely, 2^9436638648 is an apocalyptic number.

It is an amenable number.

9436638648 is an abundant number, since it is smaller than the sum of its proper divisors (15418394952).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9436638648 is a wasteful number, since it uses less digits than its factorization.

9436638648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18172 (or 18168 counting only the distinct ones).

The product of its digits is 17915904, while the sum is 57.

The square root of 9436638648 is about 97142.3627878178. The cubic root of 9436638648 is about 2113.1927322948.

The spelling of 9436638648 in words is "nine billion, four hundred thirty-six million, six hundred thirty-eight thousand, six hundred forty-eight".