6221383645 has 16 divisors (see below), whose sum is σ = 7720284672. Its totient is φ = 4807932480.

The previous prime is 6221383627. The next prime is 6221383661. The reversal of 6221383645 is 5463831226.

It is not a de Polignac number, because 6221383645 - 2²⁵ = 6187829213 is a prime.

It is a super-2 number, since 2×6221383645² = 77411228916546972050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6221383598 and 6221383607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51619 + ... + 122911.

It is an arithmetic number, because the mean of its divisors is an integer number (482517792).

Almost surely, 2^6221383645 is an apocalyptic number.

It is an amenable number.

6221383645 is a deficient number, since it is larger than the sum of its proper divisors (1498901027).

6221383645 is a wasteful number, since it uses less digits than its factorization.

6221383645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71892.

The product of its digits is 207360, while the sum is 40.

The square root of 6221383645 is about 78875.7481422522. The cubic root of 6221383645 is about 1839.2001530071.

The spelling of 6221383645 in words is "six billion, two hundred twenty-one million, three hundred eighty-three thousand, six hundred forty-five".