161644150 has 12 divisors (see below), whose sum is σ = 300658212. Its totient is φ = 64657640.

The previous prime is 161644123. The next prime is 161644163. The reversal of 161644150 is 51446161.

It is a super-2 number, since 2×161644150² = 52257662458445000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1616392 + ... + 1616491.

It is an arithmetic number, because the mean of its divisors is an integer number (25054851).

Almost surely, 2^161644150 is an apocalyptic number.

161644150 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161644150 is a deficient number, since it is larger than the sum of its proper divisors (139014062).

161644150 is a wasteful number, since it uses less digits than its factorization.

161644150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3232895 (or 3232890 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 161644150 is about 12713.9352680435. The cubic root of 161644150 is about 544.7367356277.

The spelling of 161644150 in words is "one hundred sixty-one million, six hundred forty-four thousand, one hundred fifty".