1699218816869 has 4 divisors (see below), whose sum is σ = 1941964362144. Its totient is φ = 1456473271596.

The previous prime is 1699218816859. The next prime is 1699218816877. The reversal of 1699218816869 is 9686188129961.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1699218816869 - 2²⁴ = 1699202039653 is a prime.

It is a super-2 number, since 2×1699218816869² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1699218816796 and 1699218816805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1699218816859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121372772627 + ... + 121372772640.

It is an arithmetic number, because the mean of its divisors is an integer number (485491090536).

Almost surely, 2^{1699218816869} is an apocalyptic number.

It is an amenable number.

1699218816869 is a deficient number, since it is larger than the sum of its proper divisors (242745545275).

1699218816869 is an equidigital number, since it uses as much as digits as its factorization.

1699218816869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242745545274.

The product of its digits is 161243136, while the sum is 74.

The spelling of 1699218816869 in words is "one trillion, six hundred ninety-nine billion, two hundred eighteen million, eight hundred sixteen thousand, eight hundred sixty-nine".