9209772672 has 128 divisors (see below), whose sum is σ = 25479273600. Its totient is φ = 2943897600.

The previous prime is 9209772647. The next prime is 9209772673. The reversal of 9209772672 is 2762779029.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (9209772673) 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, 1678798 + ... + 1684274.

It is an arithmetic number, because the mean of its divisors is an integer number (199056825).

Almost surely, 2^9209772672 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 9209772672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12739636800).

9209772672 is an abundant number, since it is smaller than the sum of its proper divisors (16269500928).

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

9209772672 is a wasteful number, since it uses less digits than its factorization.

9209772672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5674 (or 5662 counting only the distinct ones).

The product of its (nonzero) digits is 1333584, while the sum is 51.

The square root of 9209772672 is about 95967.5605191671. The cubic root of 9209772672 is about 2096.1207804844.

The spelling of 9209772672 in words is "nine billion, two hundred nine million, seven hundred seventy-two thousand, six hundred seventy-two".