16128775 has 12 divisors (see below), whose sum is σ = 21538552. Its totient is φ = 11910240.

The previous prime is 16128769. The next prime is 16128799. The reversal of 16128775 is 57782161.

It is not a de Polignac number, because 16128775 - 2⁵ = 16128743 is a prime.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 24489 + ... + 25138.

Almost surely, 2^16128775 is an apocalyptic number.

16128775 is a deficient number, since it is larger than the sum of its proper divisors (5409777).

16128775 is a wasteful number, since it uses less digits than its factorization.

16128775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49650 (or 49645 counting only the distinct ones).

The product of its digits is 23520, while the sum is 37.

The square root of 16128775 is about 4016.0646160140. The cubic root of 16128775 is about 252.6584307815.

The spelling of 16128775 in words is "sixteen million, one hundred twenty-eight thousand, seven hundred seventy-five".