6221927655 has 16 divisors (see below), whose sum is σ = 11061204960. Its totient is φ = 3318361344.

The previous prime is 6221927651. The next prime is 6221927681. The reversal of 6221927655 is 5567291226.

6221927655 is a `hidden beast` number, since 622 + 19 + 2 + 7 + 6 + 5 + 5 = 666.

It is not a de Polignac number, because 6221927655 - 2² = 6221927651 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 6221927655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6221927651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23044042 + ... + 23044311.

It is an arithmetic number, because the mean of its divisors is an integer number (691325310).

Almost surely, 2^6221927655 is an apocalyptic number.

6221927655 is a deficient number, since it is larger than the sum of its proper divisors (4839277305).

6221927655 is a wasteful number, since it uses less digits than its factorization.

6221927655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46088367 (or 46088361 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The square root of 6221927655 is about 78879.1965920039. The cubic root of 6221927655 is about 1839.2537592021.

The spelling of 6221927655 in words is "six billion, two hundred twenty-one million, nine hundred twenty-seven thousand, six hundred fifty-five".