16717495745 has 4 divisors (see below), whose sum is σ = 20060994900. Its totient is φ = 13373996592.

The previous prime is 16717495723. The next prime is 16717495783. The reversal of 16717495745 is 54759471761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54759471761 = 127 ⋅431176943.

It can be written as a sum of positive squares in 2 ways, for example, as 2908660624 + 13808835121 = 53932^2 + 117511^2 .

It is a cyclic number.

It is not a de Polignac number, because 16717495745 - 2⁸ = 16717495489 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1671749570 + ... + 1671749579.

It is an arithmetic number, because the mean of its divisors is an integer number (5015248725).

Almost surely, 2^16717495745 is an apocalyptic number.

It is an amenable number.

16717495745 is a deficient number, since it is larger than the sum of its proper divisors (3343499155).

16717495745 is an equidigital number, since it uses as much as digits as its factorization.

16717495745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3343499154.

The product of its digits is 7408800, while the sum is 56.

The spelling of 16717495745 in words is "sixteen billion, seven hundred seventeen million, four hundred ninety-five thousand, seven hundred forty-five".