6839687289991 has 32 divisors (see below), whose sum is σ = 7159908976640. Its totient is φ = 6527910445056.

The previous prime is 6839687289949. The next prime is 6839687290069. The reversal of 6839687289991 is 1999827869386.

It is a cyclic number.

It is not a de Polignac number, because 6839687289991 - 2¹¹ = 6839687287943 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6839687289899 and 6839687289908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6839697289991) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 498185815 + ... + 498199543.

It is an arithmetic number, because the mean of its divisors is an integer number (223747155520).

Almost surely, 2^{6839687289991} is an apocalyptic number.

6839687289991 is a deficient number, since it is larger than the sum of its proper divisors (320221686649).

6839687289991 is a wasteful number, since it uses less digits than its factorization.

6839687289991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15083.

The product of its digits is 5079158784, while the sum is 85.

The spelling of 6839687289991 in words is "six trillion, eight hundred thirty-nine billion, six hundred eighty-seven million, two hundred eighty-nine thousand, nine hundred ninety-one".