7128081364 has 12 divisors (see below), whose sum is σ = 12505252788. Its totient is φ = 3555152000.

The previous prime is 7128081343. The next prime is 7128081371. The reversal of 7128081364 is 4631808217.

It can be written as a sum of positive squares in 2 ways, for example, as 3301421764 + 3826659600 = 57458^2 + 61860^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2220367 + ... + 2223574.

It is an arithmetic number, because the mean of its divisors is an integer number (1042104399).

Almost surely, 2^7128081364 is an apocalyptic number.

It is an amenable number.

7128081364 is a deficient number, since it is larger than the sum of its proper divisors (5377171424).

7128081364 is a wasteful number, since it uses less digits than its factorization.

7128081364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4444346 (or 4444344 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 7128081364 is about 84427.9655327546. The cubic root of 7128081364 is about 1924.5279205797.

The spelling of 7128081364 in words is "seven billion, one hundred twenty-eight million, eighty-one thousand, three hundred sixty-four".