161506056 has 16 divisors (see below), whose sum is σ = 403765200. Its totient is φ = 53835344.

The previous prime is 161506039. The next prime is 161506091. The reversal of 161506056 is 650605161.

It is a super-2 number, since 2×161506056² = 52168412249350272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3364686 + ... + 3364733.

It is an arithmetic number, because the mean of its divisors is an integer number (25235325).

Almost surely, 2^161506056 is an apocalyptic number.

It is an amenable number.

161506056 is an abundant number, since it is smaller than the sum of its proper divisors (242259144).

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

161506056 is a wasteful number, since it uses less digits than its factorization.

161506056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6729428 (or 6729424 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 161506056 is about 12708.5032950383. The cubic root of 161506056 is about 544.5815669920.

The spelling of 161506056 in words is "one hundred sixty-one million, five hundred six thousand, fifty-six".