165163810 has 24 divisors (see below), whose sum is σ = 345833820. Its totient is φ = 56627424.

The previous prime is 165163769. The next prime is 165163811. The reversal of 165163810 is 18361561.

It can be written as a sum of positive squares in 2 ways, for example, as 163558521 + 1605289 = 12789^2 + 1267^2 .

It is a super-2 number, since 2×165163810² = 54558168267432200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (165163811) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 168045 + ... + 169024.

Almost surely, 2^165163810 is an apocalyptic number.

165163810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165163810 is an abundant number, since it is smaller than the sum of its proper divisors (180670010).

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

165163810 is a wasteful number, since it uses less digits than its factorization.

165163810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337090 (or 337083 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 165163810 is about 12851.6072924751. The cubic root of 165163810 is about 548.6621035254.

The spelling of 165163810 in words is "one hundred sixty-five million, one hundred sixty-three thousand, eight hundred ten".