6858684350281 has 3 divisors (see below), whose sum is σ = 6858686969191. Its totient is φ = 6858681731372.

The previous prime is 6858684350279. The next prime is 6858684350317. The reversal of 6858684350281 is 1820534868586.

The square root of 6858684350281 is 2618909.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 368316685881 + 6490367664400 = 606891^2 + 2547620^2 .

It is not a de Polignac number, because 6858684350281 - 2¹ = 6858684350279 is a prime.

It is a super-2 number, since 2×6858684350281² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6858684350261) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1309455 + ... + 3928363.

Almost surely, 2^{6858684350281} is an apocalyptic number.

6858684350281 is the 2618909-th square number.

6858684350281 is the 1309455-th centered octagonal number.

It is an amenable number.

6858684350281 is a deficient number, since it is larger than the sum of its proper divisors (2618910).

6858684350281 is an frugal number, since it uses more digits than its factorization.

6858684350281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5237818 (or 2618909 counting only the distinct ones).

The product of its (nonzero) digits is 88473600, while the sum is 64.

Multiplying 6858684350281 by its sum of digits (64), we get a square (438955798417984 = 20951272²).

The spelling of 6858684350281 in words is "six trillion, eight hundred fifty-eight billion, six hundred eighty-four million, three hundred fifty thousand, two hundred eighty-one".