4220818461 has 6 divisors (see below), whose sum is σ = 6096737790. Its totient is φ = 2813878968.

The previous prime is 4220818421. The next prime is 4220818477. The reversal of 4220818461 is 1648180224.

It can be written as a sum of positive squares in only one way, i.e., 4220451225 + 367236 = 64965^2 + 606^2 .

It is not a de Polignac number, because 4220818461 - 2²⁷ = 4086600733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4220818411) 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 5 ways as a sum of consecutive naturals, for example, 234489906 + ... + 234489923.

It is an arithmetic number, because the mean of its divisors is an integer number (1016122965).

Almost surely, 2^4220818461 is an apocalyptic number.

It is an amenable number.

4220818461 is a deficient number, since it is larger than the sum of its proper divisors (1875919329).

4220818461 is a wasteful number, since it uses less digits than its factorization.

4220818461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468979835 (or 468979832 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 4220818461 is about 64967.8263527417. The cubic root of 4220818461 is about 1616.0900552134.

Adding to 4220818461 its reverse (1648180224), we get a palindrome (5868998685).

The spelling of 4220818461 in words is "four billion, two hundred twenty million, eight hundred eighteen thousand, four hundred sixty-one".