6909237648 has 120 divisors (see below), whose sum is σ = 20655706968. Its totient is φ = 2148335616.

The previous prime is 6909237637. The next prime is 6909237649. The reversal of 6909237648 is 8467329096.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 85155984 + 6824081664 = 9228^2 + 82608^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6909237594 and 6909237603.

It is not an unprimeable number, because it can be changed into a prime (6909237649) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 264136 + ... + 289112.

Almost surely, 2^6909237648 is an apocalyptic number.

6909237648 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6909237648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10327853484).

6909237648 is an abundant number, since it is smaller than the sum of its proper divisors (13746469320).

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

6909237648 is a wasteful number, since it uses less digits than its factorization.

6909237648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25121 (or 25112 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 54.

The square root of 6909237648 is about 83121.8241378280. The cubic root of 6909237648 is about 1904.6274692632.

The spelling of 6909237648 in words is "six billion, nine hundred nine million, two hundred thirty-seven thousand, six hundred forty-eight".