161986648 has 16 divisors (see below), whose sum is σ = 304164000. Its totient is φ = 80876256.

The previous prime is 161986621. The next prime is 161986661. The reversal of 161986648 is 846689161.

161986648 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 8608 + ... + 19951.

It is an arithmetic number, because the mean of its divisors is an integer number (19010250).

Almost surely, 2^161986648 is an apocalyptic number.

It is an amenable number.

161986648 is a deficient number, since it is larger than the sum of its proper divisors (142177352).

161986648 is a wasteful number, since it uses less digits than its factorization.

161986648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29274 (or 29270 counting only the distinct ones).

The product of its digits is 497664, while the sum is 49.

The square root of 161986648 is about 12727.3975344530. The cubic root of 161986648 is about 545.1212007751.

The spelling of 161986648 in words is "one hundred sixty-one million, nine hundred eighty-six thousand, six hundred forty-eight".