165809048 has 16 divisors (see below), whose sum is σ = 327255000. Its totient is φ = 78541056.

The previous prime is 165809027. The next prime is 165809051. The reversal of 165809048 is 840908561.

It is a junction number, because it is equal to n+sod(n) for n = 165808996 and 165809014.

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, 545273 + ... + 545576.

Almost surely, 2^165809048 is an apocalyptic number.

It is an amenable number.

165809048 is a deficient number, since it is larger than the sum of its proper divisors (161445952).

165809048 is a wasteful number, since it uses less digits than its factorization.

165809048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1090874 (or 1090870 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 165809048 is about 12876.6862196762. The cubic root of 165809048 is about 549.3756529566.

The spelling of 165809048 in words is "one hundred sixty-five million, eight hundred nine thousand, forty-eight".