161144155 has 8 divisors (see below), whose sum is σ = 200041200. Its totient is φ = 124469856.

The previous prime is 161144143. The next prime is 161144161. The reversal of 161144155 is 551441161.

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

It is not a de Polignac number, because 161144155 - 2¹⁵ = 161111387 is a prime.

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, 555525 + ... + 555814.

It is an arithmetic number, because the mean of its divisors is an integer number (25005150).

Almost surely, 2^161144155 is an apocalyptic number.

161144155 is a deficient number, since it is larger than the sum of its proper divisors (38897045).

161144155 is a wasteful number, since it uses less digits than its factorization.

161144155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111373.

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

The square root of 161144155 is about 12694.2567722573. The cubic root of 161144155 is about 544.1744986536.

The spelling of 161144155 in words is "one hundred sixty-one million, one hundred forty-four thousand, one hundred fifty-five".