161863584 has 48 divisors (see below), whose sum is σ = 447259680. Its totient is φ = 51114240.

The previous prime is 161863571. The next prime is 161863589. The reversal of 161863584 is 485368161.

161863584 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (161863589) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42547 + ... + 46194.

It is an arithmetic number, because the mean of its divisors is an integer number (9317910).

Almost surely, 2^161863584 is an apocalyptic number.

It is an amenable number.

161863584 is an abundant number, since it is smaller than the sum of its proper divisors (285396096).

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

161863584 is a wasteful number, since it uses less digits than its factorization.

161863584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88773 (or 88765 counting only the distinct ones).

The product of its digits is 138240, while the sum is 42.

The square root of 161863584 is about 12722.5620061370. The cubic root of 161863584 is about 544.9831198655.

The spelling of 161863584 in words is "one hundred sixty-one million, eight hundred sixty-three thousand, five hundred eighty-four".