6258220809821 has 4 divisors (see below), whose sum is σ = 6258535487100. Its totient is φ = 6257906132544.

The previous prime is 6258220809817. The next prime is 6258220809829. The reversal of 6258220809821 is 1289080228526.

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 2900842550596 + 3357378259225 = 1703186^2 + 1832315^2 .

It is a cyclic number.

It is not a de Polignac number, because 6258220809821 - 2² = 6258220809817 is a prime.

It is a super-2 number, since 2×6258220809821² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6258220809829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157308806 + ... + 157348583.

It is an arithmetic number, because the mean of its divisors is an integer number (1564633871775).

Almost surely, 2^{6258220809821} is an apocalyptic number.

It is an amenable number.

6258220809821 is a deficient number, since it is larger than the sum of its proper divisors (314677279).

6258220809821 is a wasteful number, since it uses less digits than its factorization.

6258220809821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314677278.

The product of its (nonzero) digits is 2211840, while the sum is 53.

The spelling of 6258220809821 in words is "six trillion, two hundred fifty-eight billion, two hundred twenty million, eight hundred nine thousand, eight hundred twenty-one".