16574316617 has 4 divisors (see below), whose sum is σ = 17549276436. Its totient is φ = 15599356800.

The previous prime is 16574316613. The next prime is 16574316623. The reversal of 16574316617 is 71661347561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71661347561 = 673 ⋅106480457.

It can be written as a sum of positive squares in 2 ways, for example, as 11358443776 + 5215872841 = 106576^2 + 72221^2 .

It is a cyclic number.

It is not a de Polignac number, because 16574316617 - 2² = 16574316613 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16574316613) 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, 487479884 + ... + 487479917.

It is an arithmetic number, because the mean of its divisors is an integer number (4387319109).

Almost surely, 2^16574316617 is an apocalyptic number.

16574316617 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

16574316617 is a deficient number, since it is larger than the sum of its proper divisors (974959819).

16574316617 is an equidigital number, since it uses as much as digits as its factorization.

16574316617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 974959818.

The product of its digits is 635040, while the sum is 47.

The spelling of 16574316617 in words is "sixteen billion, five hundred seventy-four million, three hundred sixteen thousand, six hundred seventeen".