165115545 has 48 divisors (see below), whose sum is σ = 308806848. Its totient is φ = 75116160.

The previous prime is 165115477. The next prime is 165115547. The reversal of 165115545 is 545511561.

It is not a de Polignac number, because 165115545 - 2⁷ = 165115417 is a prime.

It is a super-4 number, since 4×165115545⁴ (a number of 34 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165115547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 203190 + ... + 204000.

It is an arithmetic number, because the mean of its divisors is an integer number (6433476).

Almost surely, 2^165115545 is an apocalyptic number.

165115545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165115545 is a deficient number, since it is larger than the sum of its proper divisors (143691303).

165115545 is a wasteful number, since it uses less digits than its factorization.

165115545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110 (or 1103 counting only the distinct ones).

The product of its digits is 15000, while the sum is 33.

The square root of 165115545 is about 12849.7293745822. The cubic root of 165115545 is about 548.6086540513.

The spelling of 165115545 in words is "one hundred sixty-five million, one hundred fifteen thousand, five hundred forty-five".