6420355100 has 72 divisors (see below), whose sum is σ = 14255754240. Its totient is φ = 2508707520.

The previous prime is 6420355093. The next prime is 6420355157. The reversal of 6420355100 is 15530246.

It is a super-2 number, since 2×6420355100² = 82441919220192020000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6420355100.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3415961 + ... + 3417839.

Almost surely, 2^6420355100 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6420355100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7127877120).

6420355100 is an abundant number, since it is smaller than the sum of its proper divisors (7835399140).

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

6420355100 is a wasteful number, since it uses less digits than its factorization.

6420355100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2667 (or 2660 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 6420355100 is about 80127.1183807330. The cubic root of 6420355100 is about 1858.6017838080.

Adding to 6420355100 its reverse (15530246), we get a palindrome (6435885346).

The spelling of 6420355100 in words is "six billion, four hundred twenty million, three hundred fifty-five thousand, one hundred".