6226945921 has 9 divisors (see below), whose sum is σ = 7244232771. Its totient is φ = 5336908752.

The previous prime is 6226945919. The next prime is 6226945931. The reversal of 6226945921 is 1295496226.

The square root of 6226945921 is 78911.

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

It can be written as a sum of positive squares in only one way, i.e., 1566972225 + 4659973696 = 39585^2 + 68264^2 .

It is not a de Polignac number, because 6226945921 - 2¹ = 6226945919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6226945931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 546741 + ... + 558013.

Almost surely, 2^6226945921 is an apocalyptic number.

6226945921 is the 78911-st square number.

6226945921 is the 39456-th centered octagonal number.

It is an amenable number.

6226945921 is a deficient number, since it is larger than the sum of its proper divisors (1017286850).

6226945921 is an frugal number, since it uses more digits than its factorization.

6226945921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22560 (or 11280 counting only the distinct ones).

The product of its digits is 466560, while the sum is 46.

The cubic root of 6226945921 is about 1839.7481067630.

The spelling of 6226945921 in words is "six billion, two hundred twenty-six million, nine hundred forty-five thousand, nine hundred twenty-one".