161606056 has 8 divisors (see below), whose sum is σ = 303011370. Its totient is φ = 80803024.

The previous prime is 161606023. The next prime is 161606057. The reversal of 161606056 is 650606161.

It can be written as a sum of positive squares in only one way, i.e., 159617956 + 1988100 = 12634^2 + 1410^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×161606056² = 52233034671750272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161606057) 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 as a sum of consecutive naturals, namely, 10100371 + ... + 10100386.

Almost surely, 2^161606056 is an apocalyptic number.

It is an amenable number.

161606056 is a deficient number, since it is larger than the sum of its proper divisors (141405314).

161606056 is a wasteful number, since it uses less digits than its factorization.

161606056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20200763 (or 20200759 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 161606056 is about 12712.4370598245. The cubic root of 161606056 is about 544.6939403239.

The spelling of 161606056 in words is "one hundred sixty-one million, six hundred six thousand, fifty-six".