16513759457 has 6 divisors (see below), whose sum is σ = 17881763382. Its totient is φ = 15243470112.

The previous prime is 16513759441. The next prime is 16513759499. The reversal of 16513759457 is 75495731561.

It can be written as a sum of positive squares in 3 ways, for example, as 99281296 + 16414478161 = 9964^2 + 128119^2 .

It is not a de Polignac number, because 16513759457 - 2⁴ = 16513759441 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16513759399 and 16513759408.

It is not an unprimeable number, because it can be changed into a prime (16513759057) 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 5 ways as a sum of consecutive naturals, for example, 48857108 + ... + 48857445.

It is an arithmetic number, because the mean of its divisors is an integer number (2980293897).

Almost surely, 2^16513759457 is an apocalyptic number.

It is an amenable number.

16513759457 is a deficient number, since it is larger than the sum of its proper divisors (1368003925).

16513759457 is an equidigital number, since it uses as much as digits as its factorization.

16513759457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97714579 (or 97714566 counting only the distinct ones).

The product of its digits is 3969000, while the sum is 53.

The spelling of 16513759457 in words is "sixteen billion, five hundred thirteen million, seven hundred fifty-nine thousand, four hundred fifty-seven".