16517055949 has 4 divisors (see below), whose sum is σ = 16787827420. Its totient is φ = 16246284480.

The previous prime is 16517055917. The next prime is 16517055977. The reversal of 16517055949 is 94955071561.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 426133449 + 16090922500 = 20643^2 + 126850^2 .

It is a cyclic number.

It is not a de Polignac number, because 16517055949 - 2⁵ = 16517055917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16517055896 and 16517055905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16517055349) 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, 135385644 + ... + 135385765.

It is an arithmetic number, because the mean of its divisors is an integer number (4196956855).

Almost surely, 2^16517055949 is an apocalyptic number.

It is an amenable number.

16517055949 is a deficient number, since it is larger than the sum of its proper divisors (270771471).

16517055949 is an equidigital number, since it uses as much as digits as its factorization.

16517055949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270771470.

The product of its (nonzero) digits is 1701000, while the sum is 52.

The spelling of 16517055949 in words is "sixteen billion, five hundred seventeen million, fifty-five thousand, nine hundred forty-nine".