16561713 has 16 divisors (see below), whose sum is σ = 25666560. Its totient is φ = 9302736.

The previous prime is 16561709. The next prime is 16561717. The reversal of 16561713 is 31716561.

It is an interprime number because it is at equal distance from previous prime (16561709) and next prime (16561717).

It is not a de Polignac number, because 16561713 - 2² = 16561709 is a prime.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (16561717) 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, 5445 + ... + 7922.

It is an arithmetic number, because the mean of its divisors is an integer number (1604160).

Almost surely, 2^16561713 is an apocalyptic number.

It is an amenable number.

16561713 is a deficient number, since it is larger than the sum of its proper divisors (9104847).

16561713 is a wasteful number, since it uses less digits than its factorization.

16561713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13436.

The product of its digits is 3780, while the sum is 30.

The square root of 16561713 is about 4069.6084578249. The cubic root of 16561713 is about 254.8991681313.

The spelling of 16561713 in words is "sixteen million, five hundred sixty-one thousand, seven hundred thirteen".