165163538 has 8 divisors (see below), whose sum is σ = 251944560. Its totient is φ = 81182020.

The previous prime is 165163519. The next prime is 165163541. The reversal of 165163538 is 835361561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 699728 + ... + 699963.

It is an arithmetic number, because the mean of its divisors is an integer number (31493070).

Almost surely, 2^165163538 is an apocalyptic number.

165163538 is a deficient number, since it is larger than the sum of its proper divisors (86781022).

165163538 is a wasteful number, since it uses less digits than its factorization.

165163538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1399752.

The product of its digits is 64800, while the sum is 38.

The square root of 165163538 is about 12851.5967101368. The cubic root of 165163538 is about 548.6618023372.

The spelling of 165163538 in words is "one hundred sixty-five million, one hundred sixty-three thousand, five hundred thirty-eight".