6839991273987 has 12 divisors (see below), whose sum is σ = 9880042945344. Its totient is φ = 4559968544400.

The previous prime is 6839991273967. The next prime is 6839991273991. The reversal of 6839991273987 is 7893721999386.

6839991273987 is a `hidden beast` number, since 68 + 399 + 9 + 12 + 73 + 98 + 7 = 666.

It is not a de Polignac number, because 6839991273987 - 2¹⁹ = 6839990749699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6839991273967) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 369988 + ... + 3717105.

It is an arithmetic number, because the mean of its divisors is an integer number (823336912112).

Almost surely, 2^{6839991273987} is an apocalyptic number.

6839991273987 is a deficient number, since it is larger than the sum of its proper divisors (3040051671357).

6839991273987 is a wasteful number, since it uses less digits than its factorization.

6839991273987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4273050 (or 4273047 counting only the distinct ones).

The product of its digits is 2222131968, while the sum is 81.

The spelling of 6839991273987 in words is "six trillion, eight hundred thirty-nine billion, nine hundred ninety-one million, two hundred seventy-three thousand, nine hundred eighty-seven".