6840005000005 has 4 divisors (see below), whose sum is σ = 8208006000012. Its totient is φ = 5472004000000.

The previous prime is 6840004999973. The next prime is 6840005000009. The reversal of 6840005000005 is 5000005000486.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5034104429761 + 1805900570244 = 2243681^2 + 1343838^2 .

It is not a de Polignac number, because 6840005000005 - 2⁵ = 6840004999973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6840005000009) 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, 684000499996 + ... + 684000500005.

It is an arithmetic number, because the mean of its divisors is an integer number (2052001500003).

Almost surely, 2^{6840005000005} is an apocalyptic number.

It is an amenable number.

6840005000005 is a deficient number, since it is larger than the sum of its proper divisors (1368001000007).

6840005000005 is a wasteful number, since it uses less digits than its factorization.

6840005000005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1368001000006.

The product of its (nonzero) digits is 4800, while the sum is 28.

The spelling of 6840005000005 in words is "six trillion, eight hundred forty billion, five million, five", and thus it is an aban number.