6749561448 has 144 divisors (see below), whose sum is σ = 21666380580. Its totient is φ = 1892007936.

The previous prime is 6749561443. The next prime is 6749561461. The reversal of 6749561448 is 8441659476.

6749561448 is a `hidden beast` number, since 6 + 7 + 495 + 6 + 144 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6714491364 + 35070084 = 81942^2 + 5922^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6749561394 and 6749561403.

It is not an unprimeable number, because it can be changed into a prime (6749561443) 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 35 ways as a sum of consecutive naturals, for example, 168936 + ... + 205032.

Almost surely, 2^6749561448 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 6749561448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10833190290).

6749561448 is an abundant number, since it is smaller than the sum of its proper divisors (14916819132).

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

6749561448 is a wasteful number, since it uses less digits than its factorization.

6749561448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36176 (or 36162 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 54.

The square root of 6749561448 is about 82155.7146399446. The cubic root of 6749561448 is about 1889.8406450006.

The spelling of 6749561448 in words is "six billion, seven hundred forty-nine million, five hundred sixty-one thousand, four hundred forty-eight".