7446128249 has 12 divisors (see below), whose sum is σ = 8665234164. Its totient is φ = 6379881984.

The previous prime is 7446128219. The next prime is 7446128269. The reversal of 7446128249 is 9428216447.

It can be written as a sum of positive squares in 2 ways, for example, as 6038377849 + 1407750400 = 77707^2 + 37520^2 .

It is a de Polignac number, because none of the positive numbers 2^k-7446128249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7446128219) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 101597 + ... + 158789.

It is an arithmetic number, because the mean of its divisors is an integer number (722102847).

Almost surely, 2^7446128249 is an apocalyptic number.

It is an amenable number.

7446128249 is a deficient number, since it is larger than the sum of its proper divisors (1219105915).

7446128249 is a wasteful number, since it uses less digits than its factorization.

7446128249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59864 (or 59857 counting only the distinct ones).

The product of its digits is 774144, while the sum is 47.

The square root of 7446128249 is about 86290.9511420520. The cubic root of 7446128249 is about 1952.7358703791.

The spelling of 7446128249 in words is "seven billion, four hundred forty-six million, one hundred twenty-eight thousand, two hundred forty-nine".