161720062 has 16 divisors (see below), whose sum is σ = 281934720. Its totient is φ = 68133528.

The previous prime is 161720047. The next prime is 161720071. The reversal of 161720062 is 260027161.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97068 + ... + 98719.

It is an arithmetic number, because the mean of its divisors is an integer number (17620920).

Almost surely, 2^161720062 is an apocalyptic number.

161720062 is a deficient number, since it is larger than the sum of its proper divisors (120214658).

161720062 is a wasteful number, since it uses less digits than its factorization.

161720062 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195855.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 161720062 is about 12716.9203032810. The cubic root of 161720062 is about 544.8219961283.

The spelling of 161720062 in words is "one hundred sixty-one million, seven hundred twenty thousand, sixty-two".