161385170 has 8 divisors (see below), whose sum is σ = 290493324. Its totient is φ = 64554064.

The previous prime is 161385151. The next prime is 161385179. The reversal of 161385170 is 71583161.

161385170 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 148084561 + 13300609 = 12169^2 + 3647^2 .

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

It is not an unprimeable number, because it can be changed into a prime (161385179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8069249 + ... + 8069268.

Almost surely, 2^161385170 is an apocalyptic number.

161385170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161385170 is a deficient number, since it is larger than the sum of its proper divisors (129108154).

161385170 is a wasteful number, since it uses less digits than its factorization.

161385170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16138524.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 161385170 is about 12703.7462978446. The cubic root of 161385170 is about 544.4456614192.

The spelling of 161385170 in words is "one hundred sixty-one million, three hundred eighty-five thousand, one hundred seventy".