161564016 has 20 divisors (see below), whose sum is σ = 417373832. Its totient is φ = 53854656.

The previous prime is 161563999. The next prime is 161564021. The reversal of 161564016 is 610465161.

It is a super-2 number, since 2×161564016² = 52205862532096512, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 1682911 + ... + 1683006.

Almost surely, 2^161564016 is an apocalyptic number.

161564016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161564016 is an abundant number, since it is smaller than the sum of its proper divisors (255809816).

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

161564016 is a wasteful number, since it uses less digits than its factorization.

161564016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3365928 (or 3365922 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 161564016 is about 12710.7834534304. The cubic root of 161564016 is about 544.6467042245.

The spelling of 161564016 in words is "one hundred sixty-one million, five hundred sixty-four thousand, sixteen".