161956016 has 10 divisors (see below), whose sum is σ = 313789812. Its totient is φ = 80978000.

The previous prime is 161956013. The next prime is 161956021. The reversal of 161956016 is 610659161.

It is a super-2 number, since 2×161956016² = 52459502237184512, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161956013) 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 as a sum of consecutive naturals, namely, 5061110 + ... + 5061141.

Almost surely, 2^161956016 is an apocalyptic number.

161956016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161956016 is a deficient number, since it is larger than the sum of its proper divisors (151833796).

161956016 is a wasteful number, since it uses less digits than its factorization.

161956016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10122259 (or 10122253 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 161956016 is about 12726.1940893576. The cubic root of 161956016 is about 545.0868374382.

The spelling of 161956016 in words is "one hundred sixty-one million, nine hundred fifty-six thousand, sixteen".