16819639869 has 8 divisors (see below), whose sum is σ = 22431344032. Its totient is φ = 11210514480.

The previous prime is 16819639831. The next prime is 16819639981. The reversal of 16819639869 is 96893691861.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16819639869 - 2¹² = 16819635773 is a prime.

It is a super-2 number, since 2×16819639869² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16819639769) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 629422 + ... + 655599.

It is an arithmetic number, because the mean of its divisors is an integer number (2803918004).

Almost surely, 2^16819639869 is an apocalyptic number.

It is an amenable number.

16819639869 is a deficient number, since it is larger than the sum of its proper divisors (5611704163).

16819639869 is a wasteful number, since it uses less digits than its factorization.

16819639869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1289387.

The product of its digits is 30233088, while the sum is 66.

The spelling of 16819639869 in words is "sixteen billion, eight hundred nineteen million, six hundred thirty-nine thousand, eight hundred sixty-nine".