16799851969 has 2 divisors, whose sum is σ = 16799851970. Its totient is φ = 16799851968.

The previous prime is 16799851963. The next prime is 16799851987. The reversal of 16799851969 is 96915899761.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15705102400 + 1094749569 = 125320^2 + 33087^2 .

It is an emirp because it is prime and its reverse (96915899761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16799851969 - 2⁹ = 16799851457 is a prime.

It is a super-2 number, since 2×16799851969² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16799851898 and 16799851907.

It is not a weakly prime, because it can be changed into another prime (16799851963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8399925984 + 8399925985.

It is an arithmetic number, because the mean of its divisors is an integer number (8399925985).

Almost surely, 2^16799851969 is an apocalyptic number.

It is an amenable number.

16799851969 is a deficient number, since it is larger than the sum of its proper divisors (1).

16799851969 is an equidigital number, since it uses as much as digits as its factorization.

16799851969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 66134880, while the sum is 70.

The spelling of 16799851969 in words is "sixteen billion, seven hundred ninety-nine million, eight hundred fifty-one thousand, nine hundred sixty-nine".