16165540 has 24 divisors (see below), whose sum is σ = 34103160. Its totient is φ = 6436608.

The previous prime is 16165537. The next prime is 16165547. The reversal of 16165540 is 4556161.

It can be written as a sum of positive squares in 4 ways, for example, as 341056 + 15824484 = 584^2 + 3978^2 .

It is a super-2 number, since 2×16165540² = 522649366983200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16165499 and 16165508.

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

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2926 + ... + 6394.

It is an arithmetic number, because the mean of its divisors is an integer number (1420965).

Almost surely, 2^16165540 is an apocalyptic number.

16165540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16165540 is an abundant number, since it is smaller than the sum of its proper divisors (17937620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16165540 is a wasteful number, since it uses less digits than its factorization.

16165540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3711 (or 3709 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 16165540 is about 4020.6392526562. The cubic root of 16165540 is about 252.8502605630.

The spelling of 16165540 in words is "sixteen million, one hundred sixty-five thousand, five hundred forty".