16541540 has 24 divisors (see below), whose sum is σ = 35131320. Its totient is φ = 6541568.

The previous prime is 16541521. The next prime is 16541549. The reversal of 16541540 is 4514561.

16541540 = T₁₀₉ + T₁₁₀ + ... + T₄₆₄.

It can be written as a sum of positive squares in 4 ways, for example, as 155236 + 16386304 = 394^2 + 4048^2 .

It is a super-3 number, since 3×16541540³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (16541549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2867 + ... + 6426.

It is an arithmetic number, because the mean of its divisors is an integer number (1463805).

Almost surely, 2^16541540 is an apocalyptic number.

16541540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16541540 is an abundant number, since it is smaller than the sum of its proper divisors (18589780).

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

16541540 is a wasteful number, since it uses less digits than its factorization.

16541540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9391 (or 9389 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 16541540 is about 4067.1292086680. The cubic root of 16541540 is about 254.7956327441.

The spelling of 16541540 in words is "sixteen million, five hundred forty-one thousand, five hundred forty".