6421053620 has 12 divisors (see below), whose sum is σ = 13484212644. Its totient is φ = 2568421440.

The previous prime is 6421053619. The next prime is 6421053643. The reversal of 6421053620 is 263501246.

It can be written as a sum of positive squares in 2 ways, for example, as 2101672336 + 4319381284 = 45844^2 + 65722^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 160526321 + ... + 160526360.

It is an arithmetic number, because the mean of its divisors is an integer number (1123684387).

Almost surely, 2^6421053620 is an apocalyptic number.

It is an amenable number.

6421053620 is an abundant number, since it is smaller than the sum of its proper divisors (7063159024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6421053620 is a wasteful number, since it uses less digits than its factorization.

6421053620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321052690 (or 321052688 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 6421053620 is about 80131.4770860989. The cubic root of 6421053620 is about 1858.6691852428.

Adding to 6421053620 its reverse (263501246), we get a palindrome (6684554866).

The spelling of 6421053620 in words is "six billion, four hundred twenty-one million, fifty-three thousand, six hundred twenty".