8438549899919 has 4 divisors (see below), whose sum is σ = 8441962174896. Its totient is φ = 8435137624944.

The previous prime is 8438549899837. The next prime is 8438549899931. The reversal of 8438549899919 is 9199989458348.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8438549899919 - 2⁴⁰ = 7339038272143 is a prime.

It is a super-2 number, since 2×8438549899919² (a number of 27 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 (8438549899319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1706133779 + ... + 1706138724.

It is an arithmetic number, because the mean of its divisors is an integer number (2110490543724).

Almost surely, 2^{8438549899919} is an apocalyptic number.

8438549899919 is a deficient number, since it is larger than the sum of its proper divisors (3412274977).

8438549899919 is a wasteful number, since it uses less digits than its factorization.

8438549899919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3412274976.

The product of its digits is 7255941120, while the sum is 86.

The spelling of 8438549899919 in words is "eight trillion, four hundred thirty-eight billion, five hundred forty-nine million, eight hundred ninety-nine thousand, nine hundred nineteen".