161128055 has 8 divisors (see below), whose sum is σ = 210931344. Its totient is φ = 117184000.

The previous prime is 161128013. The next prime is 161128061. The reversal of 161128055 is 550821161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-161128055 is a prime.

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 (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1464746 + ... + 1464855.

It is an arithmetic number, because the mean of its divisors is an integer number (26366418).

Almost surely, 2^161128055 is an apocalyptic number.

161128055 is a deficient number, since it is larger than the sum of its proper divisors (49803289).

161128055 is a wasteful number, since it uses less digits than its factorization.

161128055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2929617.

The product of its (nonzero) digits is 2400, while the sum is 29.

The square root of 161128055 is about 12693.6226113746. The cubic root of 161128055 is about 544.1563751268.

The spelling of 161128055 in words is "one hundred sixty-one million, one hundred twenty-eight thousand, fifty-five".