9128125816 has 16 divisors (see below), whose sum is σ = 17190636840. Its totient is φ = 4543956000.

The previous prime is 9128125807. The next prime is 9128125819. The reversal of 9128125816 is 6185218219.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9128125819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2511435 + ... + 2515066.

Almost surely, 2^9128125816 is an apocalyptic number.

It is an amenable number.

9128125816 is a deficient number, since it is larger than the sum of its proper divisors (8062511024).

9128125816 is a wasteful number, since it uses less digits than its factorization.

9128125816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5026734 (or 5026730 counting only the distinct ones).

The product of its digits is 69120, while the sum is 43.

The square root of 9128125816 is about 95541.2257405148. The cubic root of 9128125816 is about 2089.9081799973.

The spelling of 9128125816 in words is "nine billion, one hundred twenty-eight million, one hundred twenty-five thousand, eight hundred sixteen".