16317665345 has 16 divisors (see below), whose sum is σ = 19756843920. Its totient is φ = 12937515264.

The previous prime is 16317665321. The next prime is 16317665347. The reversal of 16317665345 is 54356671361.

It can be written as a sum of positive squares in 8 ways, for example, as 2351862016 + 13965803329 = 48496^2 + 118177^2 .

It is a cyclic number.

It is not a de Polignac number, because 16317665345 - 2²⁶ = 16250556481 is a prime.

It is a super-2 number, since 2×16317665345² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16317665345.

It is not an unprimeable number, because it can be changed into a prime (16317665347) 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, 244451 + ... + 303959.

It is an arithmetic number, because the mean of its divisors is an integer number (1234802745).

Almost surely, 2^16317665345 is an apocalyptic number.

It is an amenable number.

16317665345 is a deficient number, since it is larger than the sum of its proper divisors (3439178575).

16317665345 is a wasteful number, since it uses less digits than its factorization.

16317665345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60004.

The product of its digits is 1360800, while the sum is 47.

The spelling of 16317665345 in words is "sixteen billion, three hundred seventeen million, six hundred sixty-five thousand, three hundred forty-five".