16423943508869 has 8 divisors (see below), whose sum is σ = 17951313686880. Its totient is φ = 14934286174896.

The previous prime is 16423943508859. The next prime is 16423943508871. The reversal of 16423943508869 is 96880534932461.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16423943508869 is a prime.

It is a super-2 number, since 2×16423943508869² (a number of 27 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 = 16423943508799 and 16423943508808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16423943508859) 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, 9428210099 + ... + 9428211840.

It is an arithmetic number, because the mean of its divisors is an integer number (2243914210860).

Almost surely, 2^{16423943508869} is an apocalyptic number.

It is an amenable number.

16423943508869 is a deficient number, since it is larger than the sum of its proper divisors (1527370178011).

16423943508869 is a wasteful number, since it uses less digits than its factorization.

16423943508869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18856422019.

The product of its (nonzero) digits is 268738560, while the sum is 68.

The spelling of 16423943508869 in words is "sixteen trillion, four hundred twenty-three billion, nine hundred forty-three million, five hundred eight thousand, eight hundred sixty-nine".