6821118485 has 4 divisors (see below), whose sum is σ = 8185342188. Its totient is φ = 5456894784.

The previous prime is 6821118481. The next prime is 6821118529. The reversal of 6821118485 is 5848111286.

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 2653383121 + 4167735364 = 51511^2 + 64558^2 .

It is a cyclic number.

It is not a de Polignac number, because 6821118485 - 2² = 6821118481 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 (6821118481) 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, 682111844 + ... + 682111853.

It is an arithmetic number, because the mean of its divisors is an integer number (2046335547).

Almost surely, 2^6821118485 is an apocalyptic number.

It is an amenable number.

6821118485 is a deficient number, since it is larger than the sum of its proper divisors (1364223703).

6821118485 is a wasteful number, since it uses less digits than its factorization.

6821118485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1364223702.

The product of its digits is 122880, while the sum is 44.

The square root of 6821118485 is about 82590.0628707837. The cubic root of 6821118485 is about 1896.4957093009.

The spelling of 6821118485 in words is "six billion, eight hundred twenty-one million, one hundred eighteen thousand, four hundred eighty-five".