165810040 has 32 divisors (see below), whose sum is σ = 406989360. Its totient is φ = 60294400.

The previous prime is 165810011. The next prime is 165810067. The reversal of 165810040 is 40018561.

165810040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 165809987 and 165810014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187981 + ... + 188860.

Almost surely, 2^165810040 is an apocalyptic number.

165810040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165810040 is an abundant number, since it is smaller than the sum of its proper divisors (241179320).

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

165810040 is a wasteful number, since it uses less digits than its factorization.

165810040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376863 (or 376859 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 165810040 is about 12876.7247388457. The cubic root of 165810040 is about 549.3767485534.

The spelling of 165810040 in words is "one hundred sixty-five million, eight hundred ten thousand, forty".