128199564 has 48 divisors (see below), whose sum is σ = 332989440. Its totient is φ = 42653520.

The previous prime is 128199557. The next prime is 128199571. The reversal of 128199564 is 465991821.

128199564 is a `hidden beast` number, since 1 + 2 + 81 + 9 + 9 + 564 = 666.

It is an interprime number because it is at equal distance from previous prime (128199557) and next prime (128199571).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97737 + ... + 99039.

It is an arithmetic number, because the mean of its divisors is an integer number (6937280).

Almost surely, 2^128199564 is an apocalyptic number.

It is an amenable number.

128199564 is an abundant number, since it is smaller than the sum of its proper divisors (204789876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128199564 is a wasteful number, since it uses less digits than its factorization.

128199564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2227 (or 2219 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 128199564 is about 11322.5246301344. The cubic root of 128199564 is about 504.2301952989.

The spelling of 128199564 in words is "one hundred twenty-eight million, one hundred ninety-nine thousand, five hundred sixty-four".