161688010 has 32 divisors (see below), whose sum is σ = 325249344. Its totient is φ = 57360000.

The previous prime is 161687993. The next prime is 161688011. The reversal of 161688010 is 10886161.

It is a happy number.

161688010 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161688010² = 52286025155520200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161688011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13416 + ... + 22435.

It is an arithmetic number, because the mean of its divisors is an integer number (10164042).

Almost surely, 2^161688010 is an apocalyptic number.

161688010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161688010 is an abundant number, since it is smaller than the sum of its proper divisors (163561334).

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

161688010 is a wasteful number, since it uses less digits than its factorization.

161688010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35910.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 161688010 is about 12715.6600300574. The cubic root of 161688010 is about 544.7860002059.

The spelling of 161688010 in words is "one hundred sixty-one million, six hundred eighty-eight thousand, ten".