9138766644 has 144 divisors (see below), whose sum is σ = 27306639360. Its totient is φ = 2521834560.

The previous prime is 9138766643. The next prime is 9138766649. The reversal of 9138766644 is 4466678319.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9138766643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5772277 + ... + 5773859.

It is an arithmetic number, because the mean of its divisors is an integer number (189629440).

Almost surely, 2^9138766644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9138766644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13653319680).

9138766644 is an abundant number, since it is smaller than the sum of its proper divisors (18167872716).

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

9138766644 is a wasteful number, since it uses less digits than its factorization.

9138766644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2370 (or 2365 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 54.

The square root of 9138766644 is about 95596.8966232691. The cubic root of 9138766644 is about 2090.7199464102.

The spelling of 9138766644 in words is "nine billion, one hundred thirty-eight million, seven hundred sixty-six thousand, six hundred forty-four".