128164556 has 48 divisors (see below), whose sum is σ = 254778048. Its totient is φ = 55968000.

The previous prime is 128164541. The next prime is 128164573. The reversal of 128164556 is 655461821.

It is a happy number.

Its product of digits (57600) is a multiple of the sum of its prime divisors (1200).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120266 + ... + 121326.

It is an arithmetic number, because the mean of its divisors is an integer number (5307876).

Almost surely, 2^128164556 is an apocalyptic number.

It is an amenable number.

128164556 is a deficient number, since it is larger than the sum of its proper divisors (126613492).

128164556 is a wasteful number, since it uses less digits than its factorization.

128164556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1202 (or 1200 counting only the distinct ones).

The product of its digits is 57600, while the sum is 38.

The square root of 128164556 is about 11320.9785796105. The cubic root of 128164556 is about 504.1842936927.

The spelling of 128164556 in words is "one hundred twenty-eight million, one hundred sixty-four thousand, five hundred fifty-six".