161370144 has 120 divisors (see below), whose sum is σ = 511198380. Its totient is φ = 49641984.

The previous prime is 161370101. The next prime is 161370161. The reversal of 161370144 is 441073161.

It is a happy number.

161370144 is a `hidden beast` number, since 1 + 613 + 7 + 0 + 1 + 44 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 130233744 + 31136400 = 11412^2 + 5580^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 31302 + ... + 36090.

Almost surely, 2^161370144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161370144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255599190).

161370144 is an abundant number, since it is smaller than the sum of its proper divisors (349828236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161370144 is a wasteful number, since it uses less digits than its factorization.

161370144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4824 (or 4807 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 161370144 is about 12703.1548837287. The cubic root of 161370144 is about 544.4287637608.

The spelling of 161370144 in words is "one hundred sixty-one million, three hundred seventy thousand, one hundred forty-four".