165158836 has 12 divisors (see below), whose sum is σ = 291890340. Its totient is φ = 81761600.

The previous prime is 165158831. The next prime is 165158839. The reversal of 165158836 is 638851561.

It can be written as a sum of positive squares in 2 ways, for example, as 74718736 + 90440100 = 8644^2 + 9510^2 .

It is a super-2 number, since 2×165158836² = 54554882217749792, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 165158792 and 165158801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165158831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204001 + ... + 204808.

It is an arithmetic number, because the mean of its divisors is an integer number (24324195).

Almost surely, 2^165158836 is an apocalyptic number.

It is an amenable number.

165158836 is a deficient number, since it is larger than the sum of its proper divisors (126731504).

165158836 is a wasteful number, since it uses less digits than its factorization.

165158836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408914 (or 408912 counting only the distinct ones).

The product of its digits is 172800, while the sum is 43.

The square root of 165158836 is about 12851.4137743674. The cubic root of 165158836 is about 548.6565957153.

The spelling of 165158836 in words is "one hundred sixty-five million, one hundred fifty-eight thousand, eight hundred thirty-six".