16540865 has 8 divisors (see below), whose sum is σ = 21653568. Its totient is φ = 12029680.

The previous prime is 16540831. The next prime is 16540877. The reversal of 16540865 is 56804561.

It is a happy number.

16540865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16540865 - 2⁶ = 16540801 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150317 + ... + 150426.

It is an arithmetic number, because the mean of its divisors is an integer number (2706696).

Almost surely, 2^16540865 is an apocalyptic number.

It is an amenable number.

16540865 is a deficient number, since it is larger than the sum of its proper divisors (5112703).

16540865 is a wasteful number, since it uses less digits than its factorization.

16540865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300759.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 16540865 is about 4067.0462254565. The cubic root of 16540865 is about 254.7921669364.

The spelling of 16540865 in words is "sixteen million, five hundred forty thousand, eight hundred sixty-five".