161680832 has 28 divisors (see below), whose sum is σ = 321311016. Its totient is φ = 80720640.

The previous prime is 161680807. The next prime is 161680837. The reversal of 161680832 is 238086161.

It is a super-2 number, since 2×161680832² = 52281382872424448, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161680792 and 161680801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161680837) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 55082 + ... + 57942.

Almost surely, 2^161680832 is an apocalyptic number.

It is an amenable number.

161680832 is a deficient number, since it is larger than the sum of its proper divisors (159630184).

161680832 is an equidigital number, since it uses as much as digits as its factorization.

161680832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3756 (or 3746 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 161680832 is about 12715.3777765350. The cubic root of 161680832 is about 544.7779383181. Note that the first 3 decimals are identical.

The spelling of 161680832 in words is "one hundred sixty-one million, six hundred eighty thousand, eight hundred thirty-two".