161540170 has 16 divisors (see below), whose sum is σ = 317206368. Its totient is φ = 58741840.

The previous prime is 161540129. The next prime is 161540189. The reversal of 161540170 is 71045161.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 734164 + ... + 734383.

It is an arithmetic number, because the mean of its divisors is an integer number (19825398).

Almost surely, 2^161540170 is an apocalyptic number.

161540170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161540170 is a deficient number, since it is larger than the sum of its proper divisors (155666198).

161540170 is a wasteful number, since it uses less digits than its factorization.

161540170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1468565.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 161540170 is about 12709.8453963846. The cubic root of 161540170 is about 544.6199072420.

The spelling of 161540170 in words is "one hundred sixty-one million, five hundred forty thousand, one hundred seventy".