16996257865 has 4 divisors (see below), whose sum is σ = 20395509444. Its totient is φ = 13597006288.

The previous prime is 16996257857. The next prime is 16996257871. The reversal of 16996257865 is 56875269961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56875269961 = 103 ⋅552187087.

It can be written as a sum of positive squares in 2 ways, for example, as 2272619584 + 14723638281 = 47672^2 + 121341^2 .

It is a cyclic number.

It is not a de Polignac number, because 16996257865 - 2³ = 16996257857 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16996257797 and 16996257806.

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, 1699625782 + ... + 1699625791.

It is an arithmetic number, because the mean of its divisors is an integer number (5098877361).

Almost surely, 2^16996257865 is an apocalyptic number.

It is an amenable number.

16996257865 is a deficient number, since it is larger than the sum of its proper divisors (3399251579).

16996257865 is an equidigital number, since it uses as much as digits as its factorization.

16996257865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3399251578.

The product of its digits is 48988800, while the sum is 64.

The spelling of 16996257865 in words is "sixteen billion, nine hundred ninety-six million, two hundred fifty-seven thousand, eight hundred sixty-five".