161444157 has 32 divisors (see below), whose sum is σ = 251197440. Its totient is φ = 90331200.

The previous prime is 161444137. The next prime is 161444167. The reversal of 161444157 is 751444161.

It is not a de Polignac number, because 161444157 - 2⁶ = 161444093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161444137) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 218094 + ... + 218832.

It is an arithmetic number, because the mean of its divisors is an integer number (7849920).

Almost surely, 2^161444157 is an apocalyptic number.

It is an amenable number.

161444157 is a deficient number, since it is larger than the sum of its proper divisors (89753283).

161444157 is a wasteful number, since it uses less digits than its factorization.

161444157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 953.

The product of its digits is 13440, while the sum is 33.

The square root of 161444157 is about 12706.0677237295. The cubic root of 161444157 is about 544.5119857791.

It can be divided in two parts, 16144 and 4157, that added together give a triangular number (20301 = T₂₀₁).

The spelling of 161444157 in words is "one hundred sixty-one million, four hundred forty-four thousand, one hundred fifty-seven".