128553956 has 12 divisors (see below), whose sum is σ = 225283968. Its totient is φ = 64187112.

The previous prime is 128553941. The next prime is 128553967. The reversal of 128553956 is 659355821.

It is a super-2 number, since 2×128553956² = 33052239206499872, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19196 + ... + 25011.

It is an arithmetic number, because the mean of its divisors is an integer number (18773664).

Almost surely, 2^128553956 is an apocalyptic number.

It is an amenable number.

128553956 is a deficient number, since it is larger than the sum of its proper divisors (96730012).

128553956 is a wasteful number, since it uses less digits than its factorization.

128553956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44938 (or 44936 counting only the distinct ones).

The product of its digits is 324000, while the sum is 44.

The square root of 128553956 is about 11338.1636961194. The cubic root of 128553956 is about 504.6943953682.

The spelling of 128553956 in words is "one hundred twenty-eight million, five hundred fifty-three thousand, nine hundred fifty-six".