165600155 has 24 divisors (see below), whose sum is σ = 233361648. Its totient is φ = 112475328.

The previous prime is 165600137. The next prime is 165600163. The reversal of 165600155 is 551006561.

It is not a de Polignac number, because 165600155 - 2⁶ = 165600091 is a prime.

It is a super-2 number, since 2×165600155² = 54846822672048050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23057 + ... + 29373.

It is an arithmetic number, because the mean of its divisors is an integer number (9723402).

Almost surely, 2^165600155 is an apocalyptic number.

165600155 is a deficient number, since it is larger than the sum of its proper divisors (67761493).

165600155 is a wasteful number, since it uses less digits than its factorization.

165600155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6443 (or 6436 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 165600155 is about 12868.5723761418. The cubic root of 165600155 is about 549.1448473867.

The spelling of 165600155 in words is "one hundred sixty-five million, six hundred thousand, one hundred fifty-five".