6840126852605 has 4 divisors (see below), whose sum is σ = 8208152223132. Its totient is φ = 5472101482080.

The previous prime is 6840126852589. The next prime is 6840126852631. The reversal of 6840126852605 is 5062586210486.

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 2168533088836 + 4671593763769 = 1472594^2 + 2161387^2 .

It is not a de Polignac number, because 6840126852605 - 2⁴ = 6840126852589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 684012685256 + ... + 684012685265.

It is an arithmetic number, because the mean of its divisors is an integer number (2052038055783).

Almost surely, 2^{6840126852605} is an apocalyptic number.

It is an amenable number.

6840126852605 is a deficient number, since it is larger than the sum of its proper divisors (1368025370527).

6840126852605 is a wasteful number, since it uses less digits than its factorization.

6840126852605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1368025370526.

The product of its (nonzero) digits is 5529600, while the sum is 53.

The spelling of 6840126852605 in words is "six trillion, eight hundred forty billion, one hundred twenty-six million, eight hundred fifty-two thousand, six hundred five".