7128904912 has 10 divisors (see below), whose sum is σ = 13812253298. Its totient is φ = 3564452448.

The previous prime is 7128904891. The next prime is 7128904921. The reversal of 7128904912 is 2194098217.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 7102444176 + 26460736 = 84276^2 + 5144^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222778263 + ... + 222778294.

Almost surely, 2^7128904912 is an apocalyptic number.

It is an amenable number.

7128904912 is a deficient number, since it is larger than the sum of its proper divisors (6683348386).

7128904912 is a wasteful number, since it uses less digits than its factorization.

7128904912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445556565 (or 445556559 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 7128904912 is about 84432.8426147077. The cubic root of 7128904912 is about 1924.6020349640.

The spelling of 7128904912 in words is "seven billion, one hundred twenty-eight million, nine hundred four thousand, nine hundred twelve".