6281656826861 has 8 divisors (see below), whose sum is σ = 6816501361824. Its totient is φ = 5754189458160.

The previous prime is 6281656826849. The next prime is 6281656826867. The reversal of 6281656826861 is 1686286561826.

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

It is a de Polignac number, because none of the positive numbers 2^k-6281656826861 is a prime.

It is a super-2 number, since 2×6281656826861² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6281656826867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1844289791 + ... + 1844293196.

It is an arithmetic number, because the mean of its divisors is an integer number (852062670228).

Almost surely, 2^{6281656826861} is an apocalyptic number.

It is an amenable number.

6281656826861 is a deficient number, since it is larger than the sum of its proper divisors (534844534963).

6281656826861 is a wasteful number, since it uses less digits than its factorization.

6281656826861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3688583131.

The product of its digits is 79626240, while the sum is 65.

The spelling of 6281656826861 in words is "six trillion, two hundred eighty-one billion, six hundred fifty-six million, eight hundred twenty-six thousand, eight hundred sixty-one".