9657212128 has 48 divisors (see below), whose sum is σ = 19135494000. Its totient is φ = 4797499392.

The previous prime is 9657212113. The next prime is 9657212129. The reversal of 9657212128 is 8212127569.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9657212129) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4534968 + ... + 4537096.

It is an arithmetic number, because the mean of its divisors is an integer number (398656125).

Almost surely, 2^9657212128 is an apocalyptic number.

It is an amenable number.

9657212128 is a deficient number, since it is larger than the sum of its proper divisors (9478281872).

9657212128 is a wasteful number, since it uses less digits than its factorization.

9657212128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2987 (or 2979 counting only the distinct ones).

The product of its digits is 120960, while the sum is 43.

The square root of 9657212128 is about 98271.1154307307. The cubic root of 9657212128 is about 2129.5307898413.

The spelling of 9657212128 in words is "nine billion, six hundred fifty-seven million, two hundred twelve thousand, one hundred twenty-eight".