161444155 has 8 divisors (see below), whose sum is σ = 205129152. Its totient is φ = 121557888.

The previous prime is 161444137. The next prime is 161444167. The reversal of 161444155 is 551444161.

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

It is not a de Polignac number, because 161444155 - 2²¹ = 159347003 is a prime.

It is a Duffinian 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, 949587 + ... + 949756.

It is an arithmetic number, because the mean of its divisors is an integer number (25641144).

Almost surely, 2^161444155 is an apocalyptic number.

161444155 is a deficient number, since it is larger than the sum of its proper divisors (43684997).

161444155 is a wasteful number, since it uses less digits than its factorization.

161444155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1899365.

The product of its digits is 9600, while the sum is 31.

The square root of 161444155 is about 12706.0676450269. The cubic root of 161444155 is about 544.5119835306.

The spelling of 161444155 in words is "one hundred sixty-one million, four hundred forty-four thousand, one hundred fifty-five".