6991203138169 has 8 divisors (see below), whose sum is σ = 7192269070272. Its totient is φ = 6792698555760.

The previous prime is 6991203138167. The next prime is 6991203138193. The reversal of 6991203138169 is 9618313021996.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 6991203138169 - 2¹ = 6991203138167 is a prime.

It is a super-2 number, since 2×6991203138169² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6991203138163) 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, 640331887 + ... + 640342804.

It is an arithmetic number, because the mean of its divisors is an integer number (899033633784).

Almost surely, 2^{6991203138169} is an apocalyptic number.

It is an amenable number.

6991203138169 is a deficient number, since it is larger than the sum of its proper divisors (201065932103).

6991203138169 is a wasteful number, since it uses less digits than its factorization.

6991203138169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1280674847.

The product of its (nonzero) digits is 3779136, while the sum is 58.

The spelling of 6991203138169 in words is "six trillion, nine hundred ninety-one billion, two hundred three million, one hundred thirty-eight thousand, one hundred sixty-nine".