16410561 has 4 divisors (see below), whose sum is σ = 21880752. Its totient is φ = 10940372.

The previous prime is 16410553. The next prime is 16410577. The reversal of 16410561 is 16501461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16410561 - 2³ = 16410553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16410521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2735091 + ... + 2735096.

It is an arithmetic number, because the mean of its divisors is an integer number (5470188).

Almost surely, 2^16410561 is an apocalyptic number.

It is an amenable number.

16410561 is a deficient number, since it is larger than the sum of its proper divisors (5470191).

16410561 is an equidigital number, since it uses as much as digits as its factorization.

16410561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5470190.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 16410561 is about 4050.9950629444. The cubic root of 16410561 is about 254.1213434308.

The spelling of 16410561 in words is "sixteen million, four hundred ten thousand, five hundred sixty-one".