6854358594889 has 27 divisors (see below), whose sum is σ = 7629597945333. Its totient is φ = 6154966520352.

The previous prime is 6854358594887. The next prime is 6854358594973. The reversal of 6854358594889 is 9884958534586.

The square root of 6854358594889 is 2618083.

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

It can be written as a sum of positive squares in 4 ways, for example, as 28470825289 + 6825887769600 = 168733^2 + 2612640^2 .

It is not a de Polignac number, because 6854358594889 - 2¹ = 6854358594887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6854358594887) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1259295202 + ... + 1259300644.

It is an arithmetic number, because the mean of its divisors is an integer number (282577701679).

Almost surely, 2^{6854358594889} is an apocalyptic number.

6854358594889 is the 2618083-rd square number.

6854358594889 is the 1309042-nd centered octagonal number.

It is an amenable number.

6854358594889 is a deficient number, since it is larger than the sum of its proper divisors (775239350444).

6854358594889 is an frugal number, since it uses more digits than its factorization.

6854358594889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10986 (or 5493 counting only the distinct ones).

The product of its digits is 11943936000, while the sum is 82.

The spelling of 6854358594889 in words is "six trillion, eight hundred fifty-four billion, three hundred fifty-eight million, five hundred ninety-four thousand, eight hundred eighty-nine".