16185128055 has 32 divisors (see below), whose sum is σ = 28138506240. Its totient is φ = 7913946240.

The previous prime is 16185128051. The next prime is 16185128087. The reversal of 16185128055 is 55082158161.

It is not a de Polignac number, because 16185128055 - 2² = 16185128051 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16185127998 and 16185128016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16185128051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 907132 + ... + 924801.

It is an arithmetic number, because the mean of its divisors is an integer number (879328320).

Almost surely, 2^16185128055 is an apocalyptic number.

16185128055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16185128055 is a deficient number, since it is larger than the sum of its proper divisors (11953378185).

16185128055 is a wasteful number, since it uses less digits than its factorization.

16185128055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1831991.

The product of its (nonzero) digits is 96000, while the sum is 42.

The spelling of 16185128055 in words is "sixteen billion, one hundred eighty-five million, one hundred twenty-eight thousand, fifty-five".