6421788252210 has 64 divisors (see below), whose sum is σ = 16343002806912. Its totient is φ = 1609362134016.

The previous prime is 6421788252199. The next prime is 6421788252223. The reversal of 6421788252210 is 122528871246.

It is a self number, because there is not a number n which added to its sum of digits gives 6421788252210.

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 31 ways as a sum of consecutive naturals, for example, 8954392 + ... + 9644931.

It is an arithmetic number, because the mean of its divisors is an integer number (255359418858).

Almost surely, 2^{6421788252210} is an apocalyptic number.

6421788252210 is an abundant number, since it is smaller than the sum of its proper divisors (9921214554702).

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

6421788252210 is a wasteful number, since it uses less digits than its factorization.

6421788252210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18600027.

The product of its (nonzero) digits is 860160, while the sum is 48.

The spelling of 6421788252210 in words is "six trillion, four hundred twenty-one billion, seven hundred eighty-eight million, two hundred fifty-two thousand, two hundred ten".