128016550 has 24 divisors (see below), whose sum is σ = 241471152. Its totient is φ = 50484000.

The previous prime is 128016541. The next prime is 128016569. The reversal of 128016550 is 55610821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14481 + ... + 21580.

It is an arithmetic number, because the mean of its divisors is an integer number (10061298).

Almost surely, 2^128016550 is an apocalyptic number.

128016550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128016550 is a deficient number, since it is larger than the sum of its proper divisors (113454602).

128016550 is a wasteful number, since it uses less digits than its factorization.

128016550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36144 (or 36139 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 128016550 is about 11314.4398889207. The cubic root of 128016550 is about 503.9901395358.

The spelling of 128016550 in words is "one hundred twenty-eight million, sixteen thousand, five hundred fifty".