16165545 has 16 divisors (see below), whose sum is σ = 28216512. Its totient is φ = 7837760.

The previous prime is 16165537. The next prime is 16165547. The reversal of 16165545 is 54556161.

It is not a de Polignac number, because 16165545 - 2³ = 16165537 is a prime.

It is a super-2 number, since 2×16165545² = 522649690294050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (16165547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48822 + ... + 49151.

It is an arithmetic number, because the mean of its divisors is an integer number (1763532).

Almost surely, 2^16165545 is an apocalyptic number.

16165545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16165545 is a deficient number, since it is larger than the sum of its proper divisors (12050967).

16165545 is a wasteful number, since it uses less digits than its factorization.

16165545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97992.

The product of its digits is 18000, while the sum is 33.

The square root of 16165545 is about 4020.6398744478. The cubic root of 16165545 is about 252.8502866319.

It can be divided in two parts, 16 and 165545, that added together give a palindrome (165561).

The spelling of 16165545 in words is "sixteen million, one hundred sixty-five thousand, five hundred forty-five".