128625656 has 16 divisors (see below), whose sum is σ = 241307640. Its totient is φ = 64276960.

The previous prime is 128625631. The next prime is 128625661. The reversal of 128625656 is 656526821.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16571 + ... + 23061.

Almost surely, 2^128625656 is an apocalyptic number.

It is an amenable number.

128625656 is a deficient number, since it is larger than the sum of its proper divisors (112681984).

128625656 is a wasteful number, since it uses less digits than its factorization.

128625656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8974 (or 8970 counting only the distinct ones).

The product of its digits is 172800, while the sum is 41.

The square root of 128625656 is about 11341.3251430333. The cubic root of 128625656 is about 504.7882077610.

The spelling of 128625656 in words is "one hundred twenty-eight million, six hundred twenty-five thousand, six hundred fifty-six".