6402055212 has 144 divisors (see below), whose sum is σ = 19369566720. Its totient is φ = 1828640016.

The previous prime is 6402055183. The next prime is 6402055213. The reversal of 6402055212 is 2125502046.

6402055212 is a `hidden beast` number, since 640 + 2 + 0 + 5 + 5 + 2 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6402055213) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 1813393 + ... + 1816919.

It is an arithmetic number, because the mean of its divisors is an integer number (134510880).

Almost surely, 2^6402055212 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 6402055212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9684783360).

6402055212 is an abundant number, since it is smaller than the sum of its proper divisors (12967511508).

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

6402055212 is an equidigital number, since it uses as much as digits as its factorization.

6402055212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3575 (or 3539 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 6402055212 is about 80012.8440439408. The cubic root of 6402055212 is about 1856.8342506978.

Adding to 6402055212 its reverse (2125502046), we get a palindrome (8527557258).

The spelling of 6402055212 in words is "six billion, four hundred two million, fifty-five thousand, two hundred twelve".