6221418632861 has 8 divisors (see below), whose sum is σ = 6629342300280. Its totient is φ = 5818156950528.

The previous prime is 6221418632833. The next prime is 6221418632887. The reversal of 6221418632861 is 1682368141226.

It can be written as a sum of positive squares in 4 ways, for example, as 2079811044025 + 4141607588836 = 1442155^2 + 2035094^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6221418632861 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 (6221418632801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1165493516 + ... + 1165498853.

It is an arithmetic number, because the mean of its divisors is an integer number (828667787535).

Almost surely, 2^{6221418632861} is an apocalyptic number.

It is an amenable number.

6221418632861 is a deficient number, since it is larger than the sum of its proper divisors (407923667419).

6221418632861 is a wasteful number, since it uses less digits than its factorization.

6221418632861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2330992543.

The product of its digits is 1327104, while the sum is 50.

The spelling of 6221418632861 in words is "six trillion, two hundred twenty-one billion, four hundred eighteen million, six hundred thirty-two thousand, eight hundred sixty-one".