16513417663 has 4 divisors (see below), whose sum is σ = 17231392368. Its totient is φ = 15795442960.

The previous prime is 16513417651. The next prime is 16513417729. The reversal of 16513417663 is 36671431561.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36671431561 = 17 ⋅2157143033.

It is a cyclic number.

It is not a de Polignac number, because 16513417663 - 2⁵ = 16513417631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16513417463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 358987318 + ... + 358987363.

It is an arithmetic number, because the mean of its divisors is an integer number (4307848092).

Almost surely, 2^16513417663 is an apocalyptic number.

16513417663 is a deficient number, since it is larger than the sum of its proper divisors (717974705).

16513417663 is an equidigital number, since it uses as much as digits as its factorization.

16513417663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717974704.

The product of its digits is 272160, while the sum is 43.

The spelling of 16513417663 in words is "sixteen billion, five hundred thirteen million, four hundred seventeen thousand, six hundred sixty-three".