161727760 has 20 divisors (see below), whose sum is σ = 376017228. Its totient is φ = 64691072.

The previous prime is 161727757. The next prime is 161727763. The reversal of 161727760 is 67727161.

161727760 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (161727757) and next prime (161727763).

It can be written as a sum of positive squares in 2 ways, for example, as 114832656 + 46895104 = 10716^2 + 6848^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (161727763) 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, 1010719 + ... + 1010878.

Almost surely, 2^161727760 is an apocalyptic number.

161727760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161727760 is an abundant number, since it is smaller than the sum of its proper divisors (214289468).

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

161727760 is a wasteful number, since it uses less digits than its factorization.

161727760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2021610 (or 2021604 counting only the distinct ones).

The product of its (nonzero) digits is 24696, while the sum is 37.

The square root of 161727760 is about 12717.2229672991. Note that the first 3 decimals coincide. The cubic root of 161727760 is about 544.8306406406.

It can be divided in two parts, 16172 and 7760, that added together give a palindrome (23932).

The spelling of 161727760 in words is "one hundred sixty-one million, seven hundred twenty-seven thousand, seven hundred sixty".